static GstMemory *
gst_wl_shm_allocator_alloc (GstAllocator * allocator, gsize size,
GstAllocationParams * params)
{
GstWlShmAllocator *self = GST_WL_SHM_ALLOCATOR (allocator);
char filename[1024];
static int init = 0;
int fd;
GstMemory *mem;
GstMapInfo info;
/* TODO: make use of the allocation params, if necessary */
/* allocate shm pool */
snprintf (filename, 1024, "%s/%s-%d-%s", g_get_user_runtime_dir (),
"wayland-shm", init++, "XXXXXX");
fd = g_mkstemp (filename);
if (fd < 0) {
GST_ERROR_OBJECT (self, "opening temp file %s failed: %s", filename,
strerror (errno));
return NULL;
}
if (ftruncate (fd, size) < 0) {
GST_ERROR_OBJECT (self, "ftruncate failed: %s", strerror (errno));
close (fd);
return NULL;
}
mem = gst_fd_allocator_alloc (allocator, fd, size,
GST_FD_MEMORY_FLAG_KEEP_MAPPED);
if (G_UNLIKELY (!mem)) {
GST_ERROR_OBJECT (self, "GstFdMemory allocation failed");
close (fd);
return NULL;
}
/* we need to map the memory in order to unlink the file without losing it */
if (!gst_memory_map (mem, &info, GST_MAP_READWRITE)) {
GST_ERROR_OBJECT (self, "GstFdMemory map failed");
close (fd);
return NULL;
}
/* unmap will not really munmap(), we just
* need it to release the miniobject lock */
gst_memory_unmap (mem, &info);
unlink (filename);
return mem;
}
static GstMemory *
gst_wl_shm_allocator_alloc (GstAllocator * allocator, gsize size,
GstAllocationParams * params)
{
GstWlShmAllocator *self = GST_WL_SHM_ALLOCATOR (allocator);
char filename[1024];
static int init = 0;
int fd;
gpointer data;
GstWlShmMemory *mem;
/* TODO: make use of the allocation params, if necessary */
/* allocate shm pool */
snprintf (filename, 1024, "%s/%s-%d-%s", g_get_user_runtime_dir (),
"wayland-shm", init++, "XXXXXX");
fd = g_mkstemp (filename);
if (fd < 0) {
GST_ERROR_OBJECT (self, "opening temp file %s failed: %s", filename,
strerror (errno));
return NULL;
}
if (ftruncate (fd, size) < 0) {
GST_ERROR_OBJECT (self, "ftruncate failed: %s", strerror (errno));
close (fd);
return NULL;
}
data = mmap (NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (data == MAP_FAILED) {
GST_ERROR_OBJECT (self, "mmap failed: %s", strerror (errno));
close (fd);
return NULL;
}
unlink (filename);
mem = g_slice_new0 (GstWlShmMemory);
gst_memory_init ((GstMemory *) mem, GST_MEMORY_FLAG_NO_SHARE, allocator, NULL,
size, 0, 0, size);
mem->data = data;
mem->fd = fd;
return (GstMemory *) mem;
}
