r901 - trunk/platform
DONOTREPLY at icculus.org
DONOTREPLY at icculus.org
Tue Apr 3 01:01:13 EDT 2007
Author: icculus
Date: 2007-04-03 01:01:13 -0400 (Tue, 03 Apr 2007)
New Revision: 901
Modified:
trunk/platform/unix.c
Log:
Reverted change r857:858...recursive mutex APIs sort of suck for portability.
Modified: trunk/platform/unix.c
===================================================================
--- trunk/platform/unix.c 2007-04-03 02:17:43 UTC (rev 900)
+++ trunk/platform/unix.c 2007-04-03 05:01:13 UTC (rev 901)
@@ -289,7 +289,6 @@
} /* __PHYSFS_platformSetDefaultAllocator */
-
#if (defined PHYSFS_NO_PTHREADS_SUPPORT)
PHYSFS_uint64 __PHYSFS_platformGetThreadID(void) { return(0x0001); }
@@ -300,6 +299,13 @@
#else
+typedef struct
+{
+ pthread_mutex_t mutex;
+ pthread_t owner;
+ PHYSFS_uint32 count;
+} PthreadMutex;
+
/* Just in case; this is a panic value. */
#if ((!defined SIZEOF_INT) || (SIZEOF_INT <= 0))
# define SIZEOF_INT 4
@@ -323,56 +329,62 @@
void *__PHYSFS_platformCreateMutex(void)
{
- pthread_mutex_t *m = NULL;
- pthread_mutexattr_t attr;
int rc;
-
- rc = pthread_mutexattr_init(&attr);
- if (rc == 0)
- {
- rc = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
- if (rc == 0)
- {
- m = (pthread_mutex_t *) allocator.Malloc(sizeof (pthread_mutex_t));
- if (m == NULL)
- rc = ENOMEM;
- else
- rc = pthread_mutex_init(m, &attr);
- } /* if */
- pthread_mutexattr_destroy(&attr);
- } /* if */
-
+ PthreadMutex *m = (PthreadMutex *) allocator.Malloc(sizeof (PthreadMutex));
+ BAIL_IF_MACRO(m == NULL, ERR_OUT_OF_MEMORY, NULL);
+ rc = pthread_mutex_init(&m->mutex, NULL);
if (rc != 0)
{
allocator.Free(m);
BAIL_MACRO(strerror(rc), NULL);
} /* if */
+ m->count = 0;
+ m->owner = (pthread_t) 0xDEADBEEF;
return((void *) m);
} /* __PHYSFS_platformCreateMutex */
void __PHYSFS_platformDestroyMutex(void *mutex)
{
- pthread_mutex_t *m = (pthread_mutex_t *) mutex;
- pthread_mutex_destroy(m);
+ PthreadMutex *m = (PthreadMutex *) mutex;
+
+ /* Destroying a locked mutex is a bug, but we'll try to be helpful. */
+ if ((m->owner == pthread_self()) && (m->count > 0))
+ pthread_mutex_unlock(&m->mutex);
+
+ pthread_mutex_destroy(&m->mutex);
allocator.Free(m);
} /* __PHYSFS_platformDestroyMutex */
int __PHYSFS_platformGrabMutex(void *mutex)
{
- pthread_mutex_t *m = (pthread_mutex_t *) mutex;
- if (pthread_mutex_lock(m) != 0)
- return(0);
+ PthreadMutex *m = (PthreadMutex *) mutex;
+ pthread_t tid = pthread_self();
+ if (m->owner != tid)
+ {
+ if (pthread_mutex_lock(&m->mutex) != 0)
+ return(0);
+ m->owner = tid;
+ } /* if */
+
+ m->count++;
return(1);
} /* __PHYSFS_platformGrabMutex */
void __PHYSFS_platformReleaseMutex(void *mutex)
{
- pthread_mutex_t *m = (pthread_mutex_t *) mutex;
- pthread_mutex_unlock(m);
+ PthreadMutex *m = (PthreadMutex *) mutex;
+ if (m->owner == pthread_self())
+ {
+ if (--m->count == 0)
+ {
+ m->owner = (pthread_t) 0xDEADBEEF;
+ pthread_mutex_unlock(&m->mutex);
+ } /* if */
+ } /* if */
} /* __PHYSFS_platformReleaseMutex */
#endif /* !PHYSFS_NO_PTHREADS_SUPPORT */
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