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Make sure that no obsolete I/O events get processed.

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Removes overlapped I/O events when a handle gets closed prematurely (before all events have been processed) to avoid potential range violation errors as a consequence.
This commit is contained in:
Sönke Ludwig 2018-03-11 20:15:58 +01:00
parent 26907c7489
commit f094b3934b
4 changed files with 16 additions and 4 deletions
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6
source/eventcore/drivers/winapi/core.d
View file

@ -184,6 +184,12 @@ final class WinAPIEventDriverCore : EventDriverCore {
nogc_assert((h in m_handles) !is null, "Handle not in use - cannot free.");
m_handles.remove(h);
}
package void discardEvents(scope OVERLAPPED_CORE*[] overlapped...)
{
import std.algorithm.searching : canFind;
m_ioEvents.filterPending!(evt => !overlapped.canFind(evt.overlapped));
}
}
private long currStdTime()

4
source/eventcore/drivers/winapi/files.d
View file

@ -146,8 +146,10 @@ final class WinAPIEventDriverFiles : EventDriverFiles {
override bool releaseRef(FileFD descriptor)
{
auto h = idToHandle(descriptor);
return m_core.m_handles[h].releaseRef({
auto slot = &m_core.m_handles[h];
return slot.releaseRef({
close(descriptor);
m_core.discardEvents(&slot.file.read.overlapped, &slot.file.write.overlapped);
m_core.freeSlot(h);
});
}

9
source/eventcore/drivers/winapi/sockets.d
View file

@ -697,13 +697,15 @@ final class WinAPIEventDriverSockets : EventDriverSockets {
override bool releaseRef(SocketFD fd)
{
import taggedalgebraic : hasType;
nogc_assert(m_sockets[fd].common.refCount > 0, "Releasing reference to unreferenced socket FD.");
if (--m_sockets[fd].common.refCount == 0) {
final switch (m_sockets[fd].specific.kind) with (SocketVector.FieldType) {
auto slot = () @trusted { return &m_sockets[fd]; } ();
nogc_assert(slot.common.refCount > 0, "Releasing reference to unreferenced socket FD.");
if (--slot.common.refCount == 0) {
final switch (slot.specific.kind) with (SocketVector.FieldType) {
case Kind.none: break;
case Kind.streamSocket:
cancelRead(cast(StreamSocketFD)fd);
cancelWrite(cast(StreamSocketFD)fd);
m_core.discardEvents(&slot.streamSocket.read.overlapped, &slot.streamSocket.write.overlapped);
break;
case Kind.streamListen:
if (m_sockets[fd].streamListen.acceptCallback)
@ -712,6 +714,7 @@ final class WinAPIEventDriverSockets : EventDriverSockets {
case Kind.datagramSocket:
cancelReceive(cast(DatagramSocketFD)fd);
cancelSend(cast(DatagramSocketFD)fd);
m_core.discardEvents(&slot.datagramSocket.read.overlapped, &slot.datagramSocket.write.overlapped);
break;
}

1
source/eventcore/drivers/winapi/watchers.d
View file

@ -82,6 +82,7 @@ final class WinAPIEventDriverWatchers : EventDriverWatchers {
catch (Exception e) assert(false, "Freeing directory watcher buffer failed.");
} ();
slot.watcher.buffer = null;
core.discardEvents(&slot.watcher.overlapped, &slot.file.write.overlapped);
core.freeSlot(handle);
}))
{