debian-packages/eventcore
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Make the Posix driver initialization nogc.

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This commit is contained in:
Sönke Ludwig 2018-10-21 20:16:26 +02:00
parent a4eaafce9a
commit e7e4a0f5f5
9 changed files with 128 additions and 85 deletions
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30
source/eventcore/driver.d
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@ -352,13 +352,31 @@ interface EventDriverSockets {
/** Retrieves a reference to a user-defined value associated with a descriptor.
*/
@property final ref T userData(T, FD)(FD descriptor)
@trusted {
@property final ref T userData(T, FD)(FD descriptor) @trusted
if (!hasNoGCLifetime!T)
{
import std.conv : emplace;
static void init(void* ptr) { emplace(cast(T*)ptr); }
static void destr(void* ptr) { destroy(*cast(T*)ptr); }
return *cast(T*)rawUserData(descriptor, T.sizeof, &init, &destr);
}
/// ditto
@property final ref T userData(T, FD)(FD descriptor) @trusted @nogc
if (hasNoGCLifetime!T)
{
import std.conv : emplace;
static void init(void* ptr) @nogc { emplace(cast(T*)ptr); }
static void destr(void* ptr) @nogc { destroy(*cast(T*)ptr); }
scope getter = {
return cast(T*)rawUserData(descriptor, T.sizeof, &init, &destr);
};
static if (__traits(compiles, () nothrow @trusted { getter(); }))
return *(cast(T* delegate() @nogc nothrow)getter)();
else
return *(cast(T* delegate() @nogc)getter)();
}
/// Low-level user data access. Use `getUserData` instead.
protected void* rawUserData(StreamSocketFD descriptor, size_t size, DataInitializer initialize, DataInitializer destroy) @system;
@ -368,6 +386,14 @@ interface EventDriverSockets {
protected void* rawUserData(DatagramSocketFD descriptor, size_t size, DataInitializer initialize, DataInitializer destroy) @system;
}
enum hasNoGCLifetime(T) = __traits(compiles, () @nogc @trusted { import std.conv : emplace; T b = void; emplace!T(&b); destroy(b); });
unittest {
static struct S1 {}
static struct S2 { ~this() { new int; } }
static assert(hasNoGCLifetime!S1);
static assert(!hasNoGCLifetime!S2);
}
/** Performs asynchronous DNS queries.
*/