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Use SRW locks for our mutex on Windows

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These avoid a kernel transition for uncontended cases
This commit is contained in:
Cameron Gutman 2021-04-25 15:04:12 -05:00
parent 13041e0323
commit ae92f15b0a
2 changed files with 5 additions and 12 deletions
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15
src/Platform.c
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@ -124,10 +124,7 @@ void PltSleepMsInterruptible(PLT_THREAD* thread, int ms) {
int PltCreateMutex(PLT_MUTEX* mutex) { int PltCreateMutex(PLT_MUTEX* mutex) {
#if defined(LC_WINDOWS) #if defined(LC_WINDOWS)
*mutex = CreateMutexEx(NULL, NULL, 0, MUTEX_ALL_ACCESS); InitializeSRWLock(mutex);
if (!*mutex) {
return -1;
}
#elif defined(__vita__) #elif defined(__vita__)
*mutex = sceKernelCreateMutex("", 0, 0, NULL); *mutex = sceKernelCreateMutex("", 0, 0, NULL);
if (*mutex < 0) { if (*mutex < 0) {
@ -146,7 +143,7 @@ int PltCreateMutex(PLT_MUTEX* mutex) {
void PltDeleteMutex(PLT_MUTEX* mutex) { void PltDeleteMutex(PLT_MUTEX* mutex) {
activeMutexes--; activeMutexes--;
#if defined(LC_WINDOWS) #if defined(LC_WINDOWS)
CloseHandle(*mutex); // No-op to destroy a SRWLOCK
#elif defined(__vita__) #elif defined(__vita__)
sceKernelDeleteMutex(*mutex); sceKernelDeleteMutex(*mutex);
#else #else
@ -156,11 +153,7 @@ void PltDeleteMutex(PLT_MUTEX* mutex) {
void PltLockMutex(PLT_MUTEX* mutex) { void PltLockMutex(PLT_MUTEX* mutex) {
#if defined(LC_WINDOWS) #if defined(LC_WINDOWS)
int err; AcquireSRWLockExclusive(mutex);
err = WaitForSingleObjectEx(*mutex, INFINITE, FALSE);
if (err != WAIT_OBJECT_0) {
LC_ASSERT(false);
}
#elif defined(__vita__) #elif defined(__vita__)
sceKernelLockMutex(*mutex, 1, NULL); sceKernelLockMutex(*mutex, 1, NULL);
#else #else
@ -170,7 +163,7 @@ void PltLockMutex(PLT_MUTEX* mutex) {
void PltUnlockMutex(PLT_MUTEX* mutex) { void PltUnlockMutex(PLT_MUTEX* mutex) {
#if defined(LC_WINDOWS) #if defined(LC_WINDOWS)
ReleaseMutex(*mutex); ReleaseSRWLockExclusive(mutex);
#elif defined(__vita__) #elif defined(__vita__)
sceKernelUnlockMutex(*mutex, 1); sceKernelUnlockMutex(*mutex, 1);
#else #else

2
src/PlatformThreads.h
View File

@ -6,7 +6,7 @@
typedef void(*ThreadEntry)(void* context); typedef void(*ThreadEntry)(void* context);
#if defined(LC_WINDOWS) #if defined(LC_WINDOWS)
typedef HANDLE PLT_MUTEX; typedef SRWLOCK PLT_MUTEX;
typedef HANDLE PLT_EVENT; typedef HANDLE PLT_EVENT;
typedef struct _PLT_THREAD { typedef struct _PLT_THREAD {
HANDLE handle; HANDLE handle;