mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-24 21:31:04 +00:00
68 lines
1.6 KiB
C++
68 lines
1.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef GFX_VR_MUTEX_H
|
|
#define GFX_VR_MUTEX_H
|
|
|
|
#if defined(XP_WIN)
|
|
# include "nsTString.h"
|
|
#endif
|
|
|
|
namespace mozilla {
|
|
namespace gfx {
|
|
|
|
#if defined(XP_WIN)
|
|
class WaitForMutex {
|
|
public:
|
|
explicit WaitForMutex(HANDLE handle) : mHandle(handle), mStatus(false) {
|
|
MOZ_ASSERT(mHandle);
|
|
|
|
DWORD dwWaitResult;
|
|
dwWaitResult = WaitForSingleObject(mHandle, // handle to mutex
|
|
INFINITE); // no time-out interval
|
|
|
|
switch (dwWaitResult) {
|
|
// The thread got ownership of the mutex
|
|
case WAIT_OBJECT_0:
|
|
mStatus = true;
|
|
break;
|
|
|
|
// The thread got ownership of an abandoned mutex
|
|
// The shmem is in an indeterminate state
|
|
case WAIT_ABANDONED:
|
|
mStatus = false;
|
|
break;
|
|
default:
|
|
mStatus = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
~WaitForMutex() {
|
|
if (mHandle && !ReleaseMutex(mHandle)) {
|
|
# ifdef MOZILLA_INTERNAL_API
|
|
nsAutoCString msg;
|
|
msg.AppendPrintf("WaitForMutex %p ReleaseMutex error \"%lu\".", mHandle,
|
|
GetLastError());
|
|
NS_WARNING(msg.get());
|
|
# endif
|
|
MOZ_ASSERT(false, "Failed to release mutex.");
|
|
}
|
|
}
|
|
|
|
bool GetStatus() { return mStatus; }
|
|
|
|
private:
|
|
HANDLE mHandle;
|
|
bool mStatus;
|
|
};
|
|
#endif
|
|
|
|
} // namespace gfx
|
|
} // namespace mozilla
|
|
|
|
#endif /* GFX_VR_MUTEX_H */
|