Fix indentation style.
This commit is contained in:
Sönke Ludwig
parent
e23090b513
commit
e1c6d99798
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@ -11,45 +11,45 @@ import std.variant : visit;
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import std.stdint;
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private struct ProcessInfo {
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bool exited = true;
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int exitCode;
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ProcessWaitCallback[] callbacks;
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size_t refCount = 0;
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EventDriverProcesses driver;
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bool exited = true;
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int exitCode;
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ProcessWaitCallback[] callbacks;
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size_t refCount = 0;
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EventDriverProcesses driver;
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DataInitializer userDataDestructor;
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ubyte[16*size_t.sizeof] userData;
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DataInitializer userDataDestructor;
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ubyte[16*size_t.sizeof] userData;
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}
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private struct StaticProcesses {
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@safe: nothrow:
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import core.sync.mutex : Mutex;
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import core.sync.mutex : Mutex;
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private {
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static shared Mutex m_mutex;
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static __gshared ProcessInfo[ProcessID] m_processes;
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}
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private {
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static shared Mutex m_mutex;
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static __gshared ProcessInfo[ProcessID] m_processes;
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}
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shared static this()
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{
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m_mutex = new shared Mutex;
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}
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shared static this()
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{
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m_mutex = new shared Mutex;
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}
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static void add(ProcessID pid, ProcessInfo info) @trusted {
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m_mutex.lock_nothrow();
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scope (exit) m_mutex.unlock_nothrow();
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static void add(ProcessID pid, ProcessInfo info) @trusted {
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m_mutex.lock_nothrow();
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scope (exit) m_mutex.unlock_nothrow();
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assert(pid !in m_processes, "Process adopted twice");
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m_processes[pid] = info;
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}
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assert(pid !in m_processes, "Process adopted twice");
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m_processes[pid] = info;
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}
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}
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private auto lockedProcessInfo(alias fn)(ProcessID pid) @trusted {
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StaticProcesses.m_mutex.lock_nothrow();
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scope (exit) StaticProcesses.m_mutex.unlock_nothrow();
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auto info = pid in StaticProcesses.m_processes;
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StaticProcesses.m_mutex.lock_nothrow();
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scope (exit) StaticProcesses.m_mutex.unlock_nothrow();
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auto info = pid in StaticProcesses.m_processes;
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return fn(info);
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return fn(info);
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}
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@ -57,380 +57,380 @@ private enum SIGCHLD = 17;
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final class SignalEventDriverProcesses(Loop : PosixEventLoop) : EventDriverProcesses {
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@safe: /*@nogc:*/ nothrow:
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import core.stdc.errno : errno, EAGAIN, EINPROGRESS;
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import core.sys.linux.sys.signalfd;
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import core.sys.posix.unistd : close, read, write, dup;
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import core.stdc.errno : errno, EAGAIN, EINPROGRESS;
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import core.sys.linux.sys.signalfd;
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import core.sys.posix.unistd : close, read, write, dup;
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private {
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Loop m_loop;
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EventDriver m_driver;
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SignalListenID m_sighandle;
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}
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private {
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Loop m_loop;
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EventDriver m_driver;
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SignalListenID m_sighandle;
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}
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this(Loop loop, EventDriver driver)
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{
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import core.sys.posix.signal;
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this(Loop loop, EventDriver driver)
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{
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import core.sys.posix.signal;
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m_loop = loop;
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m_driver = driver;
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m_loop = loop;
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m_driver = driver;
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// Listen for child process exits using SIGCHLD
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m_sighandle = () @trusted {
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sigset_t sset;
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sigemptyset(&sset);
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sigaddset(&sset, SIGCHLD);
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// Listen for child process exits using SIGCHLD
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m_sighandle = () @trusted {
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sigset_t sset;
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sigemptyset(&sset);
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sigaddset(&sset, SIGCHLD);
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assert(sigprocmask(SIG_BLOCK, &sset, null) == 0);
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assert(sigprocmask(SIG_BLOCK, &sset, null) == 0);
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return SignalListenID(signalfd(-1, &sset, SFD_NONBLOCK | SFD_CLOEXEC));
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} ();
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return SignalListenID(signalfd(-1, &sset, SFD_NONBLOCK | SFD_CLOEXEC));
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} ();
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m_loop.initFD(cast(FD)m_sighandle, FDFlags.internal, SignalSlot(null));
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m_loop.registerFD(cast(FD)m_sighandle, EventMask.read);
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m_loop.setNotifyCallback!(EventType.read)(cast(FD)m_sighandle, &onSignal);
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m_loop.initFD(cast(FD)m_sighandle, FDFlags.internal, SignalSlot(null));
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m_loop.registerFD(cast(FD)m_sighandle, EventMask.read);
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m_loop.setNotifyCallback!(EventType.read)(cast(FD)m_sighandle, &onSignal);
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onSignal(cast(FD)m_sighandle);
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}
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onSignal(cast(FD)m_sighandle);
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}
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void dispose()
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{
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FD sighandle = cast(FD)m_sighandle;
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m_loop.m_fds[sighandle].common.refCount--;
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m_loop.setNotifyCallback!(EventType.read)(sighandle, null);
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m_loop.unregisterFD(sighandle, EventMask.read|EventMask.write|EventMask.status);
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m_loop.clearFD!(SignalSlot)(sighandle);
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close(cast(int)sighandle);
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}
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void dispose()
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{
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FD sighandle = cast(FD)m_sighandle;
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m_loop.m_fds[sighandle].common.refCount--;
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m_loop.setNotifyCallback!(EventType.read)(sighandle, null);
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m_loop.unregisterFD(sighandle, EventMask.read|EventMask.write|EventMask.status);
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m_loop.clearFD!(SignalSlot)(sighandle);
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close(cast(int)sighandle);
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}
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final override ProcessID adopt(int system_pid)
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{
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auto pid = cast(ProcessID)system_pid;
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final override ProcessID adopt(int system_pid)
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{
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auto pid = cast(ProcessID)system_pid;
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ProcessInfo info;
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info.exited = false;
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info.refCount = 1;
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info.driver = this;
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StaticProcesses.add(pid, info);
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ProcessInfo info;
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info.exited = false;
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info.refCount = 1;
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info.driver = this;
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StaticProcesses.add(pid, info);
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return pid;
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}
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return pid;
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}
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final override Process spawn(
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string[] args,
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ProcessStdinFile stdin,
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ProcessStdoutFile stdout,
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ProcessStderrFile stderr,
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const string[string] env,
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ProcessConfig config,
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string working_dir)
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@trusted {
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// Use std.process to spawn processes
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import std.process : pipe, Pid, spawnProcess;
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import std.stdio : File;
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static import std.stdio;
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final override Process spawn(
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string[] args,
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ProcessStdinFile stdin,
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ProcessStdoutFile stdout,
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ProcessStderrFile stderr,
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const string[string] env,
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ProcessConfig config,
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string working_dir)
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@trusted {
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// Use std.process to spawn processes
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import std.process : pipe, Pid, spawnProcess;
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import std.stdio : File;
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static import std.stdio;
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static File fdToFile(int fd, scope const(char)[] mode)
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{
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try {
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File f;
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f.fdopen(fd, mode);
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return f;
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} catch (Exception e) {
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assert(0);
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}
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}
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static File fdToFile(int fd, scope const(char)[] mode)
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{
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try {
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File f;
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f.fdopen(fd, mode);
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return f;
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} catch (Exception e) {
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assert(0);
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}
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}
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try {
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Process process;
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File stdinFile, stdoutFile, stderrFile;
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try {
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Process process;
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File stdinFile, stdoutFile, stderrFile;
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stdinFile = stdin.visit!(
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(int handle) => fdToFile(handle, "r"),
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(ProcessRedirect redirect) {
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final switch (redirect) {
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case ProcessRedirect.inherit: return std.stdio.stdin;
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case ProcessRedirect.none: return File.init;
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case ProcessRedirect.pipe:
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auto p = pipe();
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process.stdin = m_driver.pipes.adopt(dup(p.writeEnd.fileno));
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return p.readEnd;
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}
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});
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stdinFile = stdin.visit!(
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(int handle) => fdToFile(handle, "r"),
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(ProcessRedirect redirect) {
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final switch (redirect) {
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case ProcessRedirect.inherit: return std.stdio.stdin;
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case ProcessRedirect.none: return File.init;
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case ProcessRedirect.pipe:
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auto p = pipe();
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process.stdin = m_driver.pipes.adopt(dup(p.writeEnd.fileno));
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return p.readEnd;
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}
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});
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stdoutFile = stdout.visit!(
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(int handle) => fdToFile(handle, "w"),
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(ProcessRedirect redirect) {
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final switch (redirect) {
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case ProcessRedirect.inherit: return std.stdio.stdout;
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case ProcessRedirect.none: return File.init;
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case ProcessRedirect.pipe:
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auto p = pipe();
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process.stdout = m_driver.pipes.adopt(dup(p.readEnd.fileno));
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return p.writeEnd;
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}
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},
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(_) => File.init);
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stdoutFile = stdout.visit!(
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(int handle) => fdToFile(handle, "w"),
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(ProcessRedirect redirect) {
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final switch (redirect) {
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case ProcessRedirect.inherit: return std.stdio.stdout;
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case ProcessRedirect.none: return File.init;
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case ProcessRedirect.pipe:
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auto p = pipe();
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process.stdout = m_driver.pipes.adopt(dup(p.readEnd.fileno));
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return p.writeEnd;
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}
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},
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(_) => File.init);
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stderrFile = stderr.visit!(
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(int handle) => fdToFile(handle, "w"),
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(ProcessRedirect redirect) {
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final switch (redirect) {
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case ProcessRedirect.inherit: return std.stdio.stderr;
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case ProcessRedirect.none: return File.init;
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case ProcessRedirect.pipe:
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auto p = pipe();
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process.stderr = m_driver.pipes.adopt(dup(p.readEnd.fileno));
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return p.writeEnd;
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}
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},
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(_) => File.init);
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stderrFile = stderr.visit!(
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(int handle) => fdToFile(handle, "w"),
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(ProcessRedirect redirect) {
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final switch (redirect) {
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case ProcessRedirect.inherit: return std.stdio.stderr;
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case ProcessRedirect.none: return File.init;
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case ProcessRedirect.pipe:
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auto p = pipe();
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process.stderr = m_driver.pipes.adopt(dup(p.readEnd.fileno));
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return p.writeEnd;
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}
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},
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(_) => File.init);
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const redirectStdout = stdout.convertsTo!ProcessStdoutRedirect;
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const redirectStderr = stderr.convertsTo!ProcessStderrRedirect;
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const redirectStdout = stdout.convertsTo!ProcessStdoutRedirect;
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const redirectStderr = stderr.convertsTo!ProcessStderrRedirect;
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if (redirectStdout) {
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assert(!redirectStderr, "Can't redirect both stdout and stderr");
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if (redirectStdout) {
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assert(!redirectStderr, "Can't redirect both stdout and stderr");
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stdoutFile = stderrFile;
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} else if (redirectStderr) {
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stderrFile = stdoutFile;
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}
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stdoutFile = stderrFile;
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} else if (redirectStderr) {
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stderrFile = stdoutFile;
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}
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Pid stdPid = spawnProcess(
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args,
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stdinFile,
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stdoutFile,
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stderrFile,
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env,
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cast(std.process.Config)config,
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working_dir);
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process.pid = adopt(stdPid.osHandle);
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stdPid.destroy();
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Pid stdPid = spawnProcess(
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args,
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stdinFile,
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stdoutFile,
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stderrFile,
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env,
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cast(std.process.Config)config,
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working_dir);
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process.pid = adopt(stdPid.osHandle);
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stdPid.destroy();
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return process;
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} catch (Exception e) {
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return Process.init;
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}
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}
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return process;
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} catch (Exception e) {
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return Process.init;
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}
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}
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final override void kill(ProcessID pid, int signal)
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@trusted {
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import core.sys.posix.signal : pkill = kill;
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final override void kill(ProcessID pid, int signal)
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@trusted {
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import core.sys.posix.signal : pkill = kill;
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pkill(cast(int)pid, signal);
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}
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pkill(cast(int)pid, signal);
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}
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final override size_t wait(ProcessID pid, ProcessWaitCallback on_process_exit)
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{
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bool exited;
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int exitCode;
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final override size_t wait(ProcessID pid, ProcessWaitCallback on_process_exit)
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{
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bool exited;
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int exitCode;
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size_t id = lockedProcessInfo!((info) {
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assert(info !is null, "Unknown process ID");
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size_t id = lockedProcessInfo!((info) {
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assert(info !is null, "Unknown process ID");
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if (info.exited) {
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exited = true;
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exitCode = info.exitCode;
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return 0;
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} else {
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info.callbacks ~= on_process_exit;
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return info.callbacks.length - 1;
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}
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})(pid);
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if (info.exited) {
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exited = true;
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exitCode = info.exitCode;
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return 0;
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} else {
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info.callbacks ~= on_process_exit;
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return info.callbacks.length - 1;
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}
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})(pid);
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if (exited) {
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on_process_exit(pid, exitCode);
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}
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if (exited) {
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on_process_exit(pid, exitCode);
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}
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return id;
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}
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return id;
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}
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final override void cancelWait(ProcessID pid, size_t waitId)
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{
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lockedProcessInfo!((info) {
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assert(info !is null, "Unknown process ID");
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assert(!info.exited, "Cannot cancel wait when none are pending");
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assert(info.callbacks.length > waitId, "Invalid process wait ID");
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final override void cancelWait(ProcessID pid, size_t waitId)
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{
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lockedProcessInfo!((info) {
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assert(info !is null, "Unknown process ID");
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assert(!info.exited, "Cannot cancel wait when none are pending");
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assert(info.callbacks.length > waitId, "Invalid process wait ID");
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info.callbacks[waitId] = null;
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})(pid);
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}
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info.callbacks[waitId] = null;
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})(pid);
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}
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private void onSignal(FD fd)
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{
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SignalListenID lid = cast(SignalListenID)fd;
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private void onSignal(FD fd)
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{
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SignalListenID lid = cast(SignalListenID)fd;
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signalfd_siginfo nfo;
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do {
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auto ret = () @trusted { return read(cast(int)fd, &nfo, nfo.sizeof); } ();
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signalfd_siginfo nfo;
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do {
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auto ret = () @trusted { return read(cast(int)fd, &nfo, nfo.sizeof); } ();
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if (ret == -1 && errno.among!(EAGAIN, EINPROGRESS) || ret != nfo.sizeof)
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return;
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if (ret == -1 && errno.among!(EAGAIN, EINPROGRESS) || ret != nfo.sizeof)
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return;
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onProcessExit(nfo.ssi_pid, nfo.ssi_status);
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} while (true);
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}
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onProcessExit(nfo.ssi_pid, nfo.ssi_status);
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} while (true);
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}
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private void onProcessExit(int system_pid, int exitCode)
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{
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auto pid = cast(ProcessID)system_pid;
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private void onProcessExit(int system_pid, int exitCode)
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{
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auto pid = cast(ProcessID)system_pid;
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ProcessWaitCallback[] callbacks;
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auto driver = lockedProcessInfo!((info) @safe {
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// We get notified of any child exiting, so ignore the ones we're
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// not aware of
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if (info is null) {
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return null;
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}
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ProcessWaitCallback[] callbacks;
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auto driver = lockedProcessInfo!((info) @safe {
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// We get notified of any child exiting, so ignore the ones we're
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// not aware of
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if (info is null) {
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return null;
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}
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// Increment the ref count to make sure it doesn't get removed
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info.refCount++;
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// Increment the ref count to make sure it doesn't get removed
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info.refCount++;
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info.exited = true;
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info.exitCode = exitCode;
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return info.driver;
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})(pid);
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info.exited = true;
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info.exitCode = exitCode;
|
||||
return info.driver;
|
||||
})(pid);
|
||||
|
||||
// Need to call callbacks in the owner thread as this function can be
|
||||
// called from any thread. Without extra threads this is always the main
|
||||
// thread.
|
||||
if (() @trusted { return cast(void*)this == cast(void*)driver; } ()) {
|
||||
onLocalProcessExit(cast(intptr_t)pid);
|
||||
} else if (driver) {
|
||||
auto sharedDriver = () @trusted { return cast(shared typeof(this))driver; } ();
|
||||
// Need to call callbacks in the owner thread as this function can be
|
||||
// called from any thread. Without extra threads this is always the main
|
||||
// thread.
|
||||
if (() @trusted { return cast(void*)this == cast(void*)driver; } ()) {
|
||||
onLocalProcessExit(cast(intptr_t)pid);
|
||||
} else if (driver) {
|
||||
auto sharedDriver = () @trusted { return cast(shared typeof(this))driver; } ();
|
||||
|
||||
sharedDriver.m_driver.core.runInOwnerThread(&onLocalProcessExit, cast(intptr_t)pid);
|
||||
}
|
||||
}
|
||||
sharedDriver.m_driver.core.runInOwnerThread(&onLocalProcessExit, cast(intptr_t)pid);
|
||||
}
|
||||
}
|
||||
|
||||
private static void onLocalProcessExit(intptr_t system_pid)
|
||||
{
|
||||
auto pid = cast(ProcessID)system_pid;
|
||||
private static void onLocalProcessExit(intptr_t system_pid)
|
||||
{
|
||||
auto pid = cast(ProcessID)system_pid;
|
||||
|
||||
int exitCode;
|
||||
ProcessWaitCallback[] callbacks;
|
||||
int exitCode;
|
||||
ProcessWaitCallback[] callbacks;
|
||||
|
||||
auto driver = lockedProcessInfo!((info) {
|
||||
assert(info !is null);
|
||||
auto driver = lockedProcessInfo!((info) {
|
||||
assert(info !is null);
|
||||
|
||||
exitCode = info.exitCode;
|
||||
exitCode = info.exitCode;
|
||||
|
||||
callbacks = info.callbacks;
|
||||
info.callbacks = null;
|
||||
callbacks = info.callbacks;
|
||||
info.callbacks = null;
|
||||
|
||||
return info.driver;
|
||||
})(pid);
|
||||
return info.driver;
|
||||
})(pid);
|
||||
|
||||
foreach (cb; callbacks) {
|
||||
if (cb)
|
||||
cb(pid, exitCode);
|
||||
}
|
||||
foreach (cb; callbacks) {
|
||||
if (cb)
|
||||
cb(pid, exitCode);
|
||||
}
|
||||
|
||||
driver.releaseRef(pid);
|
||||
}
|
||||
driver.releaseRef(pid);
|
||||
}
|
||||
|
||||
final override bool hasExited(ProcessID pid)
|
||||
{
|
||||
return lockedProcessInfo!((info) {
|
||||
assert(info !is null, "Unknown process ID");
|
||||
final override bool hasExited(ProcessID pid)
|
||||
{
|
||||
return lockedProcessInfo!((info) {
|
||||
assert(info !is null, "Unknown process ID");
|
||||
|
||||
return info.exited;
|
||||
})(pid);
|
||||
}
|
||||
return info.exited;
|
||||
})(pid);
|
||||
}
|
||||
|
||||
final override void addRef(ProcessID pid)
|
||||
{
|
||||
lockedProcessInfo!((info) {
|
||||
nogc_assert(info.refCount > 0, "Adding reference to unreferenced process FD.");
|
||||
info.refCount++;
|
||||
})(pid);
|
||||
}
|
||||
final override void addRef(ProcessID pid)
|
||||
{
|
||||
lockedProcessInfo!((info) {
|
||||
nogc_assert(info.refCount > 0, "Adding reference to unreferenced process FD.");
|
||||
info.refCount++;
|
||||
})(pid);
|
||||
}
|
||||
|
||||
final override bool releaseRef(ProcessID pid)
|
||||
{
|
||||
return lockedProcessInfo!((info) {
|
||||
nogc_assert(info.refCount > 0, "Releasing reference to unreferenced process FD.");
|
||||
if (--info.refCount == 0) {
|
||||
// Remove/deallocate process
|
||||
if (info.userDataDestructor)
|
||||
() @trusted { info.userDataDestructor(info.userData.ptr); } ();
|
||||
final override bool releaseRef(ProcessID pid)
|
||||
{
|
||||
return lockedProcessInfo!((info) {
|
||||
nogc_assert(info.refCount > 0, "Releasing reference to unreferenced process FD.");
|
||||
if (--info.refCount == 0) {
|
||||
// Remove/deallocate process
|
||||
if (info.userDataDestructor)
|
||||
() @trusted { info.userDataDestructor(info.userData.ptr); } ();
|
||||
|
||||
StaticProcesses.m_processes.remove(pid);
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
})(pid);
|
||||
}
|
||||
StaticProcesses.m_processes.remove(pid);
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
})(pid);
|
||||
}
|
||||
|
||||
final protected override void* rawUserData(ProcessID pid, size_t size, DataInitializer initialize, DataInitializer destroy)
|
||||
@system {
|
||||
return lockedProcessInfo!((info) {
|
||||
assert(info.userDataDestructor is null || info.userDataDestructor is destroy,
|
||||
"Requesting user data with differing type (destructor).");
|
||||
assert(size <= ProcessInfo.userData.length, "Requested user data is too large.");
|
||||
final protected override void* rawUserData(ProcessID pid, size_t size, DataInitializer initialize, DataInitializer destroy)
|
||||
@system {
|
||||
return lockedProcessInfo!((info) {
|
||||
assert(info.userDataDestructor is null || info.userDataDestructor is destroy,
|
||||
"Requesting user data with differing type (destructor).");
|
||||
assert(size <= ProcessInfo.userData.length, "Requested user data is too large.");
|
||||
|
||||
if (!info.userDataDestructor) {
|
||||
initialize(info.userData.ptr);
|
||||
info.userDataDestructor = destroy;
|
||||
}
|
||||
return info.userData.ptr;
|
||||
})(pid);
|
||||
}
|
||||
if (!info.userDataDestructor) {
|
||||
initialize(info.userData.ptr);
|
||||
info.userDataDestructor = destroy;
|
||||
}
|
||||
return info.userData.ptr;
|
||||
})(pid);
|
||||
}
|
||||
|
||||
package final @property size_t pendingCount() const nothrow @trusted { return StaticProcesses.m_processes.length; }
|
||||
package final @property size_t pendingCount() const nothrow @trusted { return StaticProcesses.m_processes.length; }
|
||||
}
|
||||
|
||||
final class DummyEventDriverProcesses(Loop : PosixEventLoop) : EventDriverProcesses {
|
||||
@safe: /*@nogc:*/ nothrow:
|
||||
|
||||
this(Loop loop, EventDriver driver) {}
|
||||
this(Loop loop, EventDriver driver) {}
|
||||
|
||||
void dispose() {}
|
||||
void dispose() {}
|
||||
|
||||
override ProcessID adopt(int system_pid)
|
||||
{
|
||||
assert(false, "TODO!");
|
||||
}
|
||||
override ProcessID adopt(int system_pid)
|
||||
{
|
||||
assert(false, "TODO!");
|
||||
}
|
||||
|
||||
override Process spawn(string[] args, ProcessStdinFile stdin, ProcessStdoutFile stdout, ProcessStderrFile stderr, const string[string] env, ProcessConfig config, string working_dir)
|
||||
{
|
||||
assert(false, "TODO!");
|
||||
}
|
||||
override Process spawn(string[] args, ProcessStdinFile stdin, ProcessStdoutFile stdout, ProcessStderrFile stderr, const string[string] env, ProcessConfig config, string working_dir)
|
||||
{
|
||||
assert(false, "TODO!");
|
||||
}
|
||||
|
||||
override bool hasExited(ProcessID pid)
|
||||
{
|
||||
assert(false, "TODO!");
|
||||
}
|
||||
override bool hasExited(ProcessID pid)
|
||||
{
|
||||
assert(false, "TODO!");
|
||||
}
|
||||
|
||||
override void kill(ProcessID pid, int signal)
|
||||
{
|
||||
assert(false, "TODO!");
|
||||
}
|
||||
override void kill(ProcessID pid, int signal)
|
||||
{
|
||||
assert(false, "TODO!");
|
||||
}
|
||||
|
||||
override size_t wait(ProcessID pid, ProcessWaitCallback on_process_exit)
|
||||
{
|
||||
assert(false, "TODO!");
|
||||
}
|
||||
override size_t wait(ProcessID pid, ProcessWaitCallback on_process_exit)
|
||||
{
|
||||
assert(false, "TODO!");
|
||||
}
|
||||
|
||||
override void cancelWait(ProcessID pid, size_t waitId)
|
||||
{
|
||||
assert(false, "TODO!");
|
||||
}
|
||||
override void cancelWait(ProcessID pid, size_t waitId)
|
||||
{
|
||||
assert(false, "TODO!");
|
||||
}
|
||||
|
||||
override void addRef(ProcessID pid)
|
||||
{
|
||||
assert(false, "TODO!");
|
||||
}
|
||||
override void addRef(ProcessID pid)
|
||||
{
|
||||
assert(false, "TODO!");
|
||||
}
|
||||
|
||||
override bool releaseRef(ProcessID pid)
|
||||
{
|
||||
assert(false, "TODO!");
|
||||
}
|
||||
override bool releaseRef(ProcessID pid)
|
||||
{
|
||||
assert(false, "TODO!");
|
||||
}
|
||||
|
||||
protected override void* rawUserData(ProcessID descriptor, size_t size, DataInitializer initialize, DataInitializer destroy)
|
||||
@system {
|
||||
assert(false, "TODO!");
|
||||
}
|
||||
protected override void* rawUserData(ProcessID descriptor, size_t size, DataInitializer initialize, DataInitializer destroy)
|
||||
@system {
|
||||
assert(false, "TODO!");
|
||||
}
|
||||
|
||||
package final @property size_t pendingCount() const nothrow { return 0; }
|
||||
package final @property size_t pendingCount() const nothrow { return 0; }
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue