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use POSIX semaphore instead of System V semaphore set

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Vincent Wei
2020-01-13 18:08:15 +08:00
parent 2d56b56826
commit 006508c84f
1 changed files with 24 additions and 1 deletions
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src/newgal/surface-shared.c
+24 -1
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@@ -71,6 +71,7 @@ GAL_Surface * GAL_CreateSharedRGBSurface (GAL_VideoDevice *video,
{
GAL_Surface *screen;
GAL_Surface *surface;
BOOL sem_inited = FALSE;
if (video == NULL) {
video = __mg_current_video;
@@ -187,7 +188,6 @@ GAL_Surface * GAL_CreateSharedRGBSurface (GAL_VideoDevice *video,
/* fill fileds of shared header */
memset (hdr, 0, sizeof(GAL_SharedSurfaceHeader));
hdr->semid = -1;
hdr->creator = getpid();
hdr->fd = fd;
hdr->byhw = byhw;
@@ -200,9 +200,22 @@ GAL_Surface * GAL_CreateSharedRGBSurface (GAL_VideoDevice *video,
hdr->Bmask = Bmask;
hdr->Amask = Amask;
hdr->buf_size = buf_size;
#if 1
/* Use a unnamed POSIX semaphore shared between processes */
if (sem_init (&hdr->sem_lock, 1, 1) < 0) {
if (errno == ENOSYS) {
_ERR_PRINTF("The system does not support process-shared semaphore.\n");
}
goto error;
}
sem_inited = TRUE;
#else
hdr->semid = -1;
hdr->sem_num = __mg_alloc_mutual_sem (&hdr->semid);
if (hdr->sem_num < 0)
goto error;
#endif
surface->pixels = surface->shared_header->buf;
// memset (surface->pixels, 0, buf_size);
@@ -226,10 +239,16 @@ GAL_Surface * GAL_CreateSharedRGBSurface (GAL_VideoDevice *video,
error:
if (surface) {
if (surface->shared_header) {
#if 1
if (sem_inited) {
sem_destroy (&surface->shared_header->sem_lock);
}
#else
if (surface->shared_header->semid >= 0) {
assert (surface->shared_header->sem_num >= 0);
__mg_free_mutual_sem (surface->shared_header->sem_num);
}
#endif
if (surface->shared_header->byhw) {
assert(video->FreeSharedHWSurface);
@@ -263,10 +282,14 @@ void GAL_FreeSharedSurfaceData (GAL_Surface *surface)
assert (surface->shared_header);
#if 1
sem_destroy (&surface->shared_header->sem_lock);
#else
if (surface->shared_header->semid >= 0) {
assert (surface->shared_header->sem_num >= 0);
__mg_free_mutual_sem (surface->shared_header->sem_num);
}
#endif
if (surface->shared_header->byhw) {
assert (video->FreeSharedHWSurface);