/** Create a gbm device for allocating buffers
*
* The file descriptor passed in is used by the backend to communicate with
* platform for allocating the memory. For allocations using DRI this would be
* the file descriptor returned when opening a device such as \c
* /dev/dri/card0
*
* \param fd The file descriptor for a backend specific device
* \return The newly created struct gbm_device. The resources associated with
* the device should be freed with gbm_device_destroy() when it is no longer
* needed. If the creation of the device failed NULL will be returned.
*/
GBM_EXPORT struct gbm_device *
gbm_create_device(int fd)
{
struct gbm_device *gbm = NULL;
struct stat buf;
if (fd < 0 || fstat(fd, &buf) < 0 || !S_ISCHR(buf.st_mode)) {
errno = EINVAL;
return NULL;
}
if (device_num == 0)
memset(devices, 0, sizeof devices);
gbm = _gbm_create_device(fd);
if (gbm == NULL)
return NULL;
gbm->dummy = gbm_create_device;
gbm->stat = buf;
gbm->refcount = 1;
if (device_num < ARRAY_SIZE(devices)-1)
devices[device_num++] = gbm;
return gbm;
}
/** Create a gbm device for allocating buffers
*
* The file descriptor passed in is used by the backend to communicate with
* platform for allocating the memory. For allocations using DRI this would be
* the file descriptor returned when opening a device such as \c
* /dev/dri/card0
*
* \param fd The file descriptor for a backend specific device
* \return The newly created struct gbm_device. The resources associated with
* the device should be freed with gbm_device_destroy() when it is no longer
* needed. If the creation of the device failed NULL will be returned.
*/
GBM_EXPORT struct gbm_device *
gbm_create_device(int fd)
{
struct gbm_device *gbm = NULL;
struct stat buf;
if (fd < 0 || fstat(fd, &buf) < 0 || !S_ISCHR(buf.st_mode)) {
errno = EINVAL;
return NULL;
}
gbm = _gbm_create_device(fd);
if (gbm == NULL)
return NULL;
gbm->dummy = gbm_create_device;
gbm->stat = buf;
gbm->refcount = 1;
return gbm;
}