mirrors/SDL
1
0
Fork 0
mirror of https://github.com/libsdl-org/SDL.git synced 2025-10-12 21:06:01 +00:00
Code Issues Packages Projects Releases Wiki Activity

Add SDL_cond implementation using Windows Condition Variables

Browse Source 
Is automatically used when the SRW SDL_mutex implementation is active.
Otherwise falls back to the generic implementation.

v2: - Rebase onto master fa3ea1051a4b
This commit is contained in:
Joel Linn
2020-12-28 11:43:11 -08:00
parent 2443e51e0e
commit 8fc0baad98
10 changed files with 254 additions and 33 deletions
Download Patch File Download Diff File Expand all files Collapse all files

36
src/thread/windows/SDL_sysmutex.c
View File

@@ -31,41 +31,19 @@
*/
#include "../../core/windows/SDL_windows.h"
#include "SDL_hints.h"
#include "SDL_mutex.h"
typedef SDL_mutex * (*pfnSDL_CreateMutex)(void);
typedef int (*pfnSDL_LockMutex)(SDL_mutex *);
typedef int (*pfnSDL_TryLockMutex)(SDL_mutex *);
typedef int (*pfnSDL_UnlockMutex)(SDL_mutex *);
typedef void (*pfnSDL_DestroyMutex)(SDL_mutex *);
#include "SDL_sysmutex_c.h"
typedef struct SDL_mutex_impl_t
{
pfnSDL_CreateMutex Create;
pfnSDL_DestroyMutex Destroy;
pfnSDL_LockMutex Lock;
pfnSDL_TryLockMutex TryLock;
pfnSDL_UnlockMutex Unlock;
} SDL_mutex_impl_t;
/* Implementation will be chosen at runtime based on available Kernel features */
static SDL_mutex_impl_t SDL_mutex_impl_active = {0};
SDL_mutex_impl_t SDL_mutex_impl_active = {0};
/**
* Implementation based on Slim Reader/Writer (SRW) Locks for Win 7 and newer.
*/
#ifndef SRWLOCK_INIT
#define SRWLOCK_INIT {0}
typedef struct _SRWLOCK {
PVOID Ptr;
} SRWLOCK, *PSRWLOCK;
#endif
#if __WINRT__
/* Functions are guaranteed to be available */
#define pReleaseSRWLockExclusive ReleaseSRWLockExclusive
@@ -80,14 +58,6 @@ static pfnAcquireSRWLockExclusive pAcquireSRWLockExclusive = NULL;
static pfnTryAcquireSRWLockExclusive pTryAcquireSRWLockExclusive = NULL;
#endif
typedef struct SDL_mutex_srw
{
SRWLOCK srw;
/* SRW Locks are not recursive, that has to be handled by SDL: */
DWORD count;
DWORD owner;
} SDL_mutex_srw;
static SDL_mutex *
SDL_CreateMutex_srw(void)
{
@@ -189,6 +159,7 @@ static const SDL_mutex_impl_t SDL_mutex_impl_srw =
&SDL_LockMutex_srw,
&SDL_TryLockMutex_srw,
&SDL_UnlockMutex_srw,
SDL_MUTEX_SRW,
};
@@ -283,6 +254,7 @@ static const SDL_mutex_impl_t SDL_mutex_impl_cs =
&SDL_LockMutex_cs,
&SDL_TryLockMutex_cs,
&SDL_UnlockMutex_cs,
SDL_MUTEX_CS,
};