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/**************************************************************************
*
* Copyright 2015, 2018 Collabora
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
#include "util/macros.h"
#include "eglcurrent.h"
#include "egldevice.h"
#include "eglglobals.h"
#include "egltypedefs.h"
struct _egl_device {
_EGLDevice *Next;
const char *extensions;
};
void
_eglFiniDevice(void)
{
_EGLDevice *dev_list, *dev;
/* atexit function is called with global mutex locked */
dev_list = _eglGlobal.DeviceList;
while (dev_list) {
/* pop list head */
dev = dev_list;
dev_list = dev_list->Next;
free(dev);
}
_eglGlobal.DeviceList = NULL;
}
EGLBoolean
_eglCheckDeviceHandle(EGLDeviceEXT device)
{
_EGLDevice *cur;
mtx_lock(_eglGlobal.Mutex);
cur = _eglGlobal.DeviceList;
while (cur) {
if (cur == (_EGLDevice *) device)
break;
cur = cur->Next;
}
mtx_unlock(_eglGlobal.Mutex);
return (cur != NULL);
}
/* Adds a device in DeviceList, if needed for the given fd.
*
* If a software device, the fd is ignored.
*/
_EGLDevice *
_eglAddDevice(int fd, bool software)
{
_EGLDevice *dev;
mtx_lock(_eglGlobal.Mutex);
dev = NULL;
out:
mtx_unlock(_eglGlobal.Mutex);
return dev;
}
EGLBoolean
_eglDeviceSupports(_EGLDevice *dev, _EGLDeviceExtension ext)
{
switch (ext) {
default:
assert(0);
return EGL_FALSE;
};
}
EGLBoolean
_eglQueryDeviceAttribEXT(_EGLDevice *dev, EGLint attribute,
EGLAttrib *value)
{
switch (attribute) {
default:
_eglError(EGL_BAD_ATTRIBUTE, "eglQueryDeviceStringEXT");
return EGL_FALSE;
}
}
const char *
_eglQueryDeviceStringEXT(_EGLDevice *dev, EGLint name)
{
switch (name) {
case EGL_EXTENSIONS:
return dev->extensions;
default:
_eglError(EGL_BAD_PARAMETER, "eglQueryDeviceStringEXT");
return NULL;
};
}
/* Do a fresh lookup for devices.
*
* Walks through the DeviceList, discarding no longer available ones
* and adding new ones as applicable.
*
* Must be called with the global lock held.
*/
static int
_eglRefreshDeviceList(void)
{
MAYBE_UNUSED _EGLDevice *dev;
int count = 0;
dev = _eglGlobal.DeviceList;
return count;
}
EGLBoolean
_eglQueryDevicesEXT(EGLint max_devices,
_EGLDevice **devices,
EGLint *num_devices)
{
_EGLDevice *dev, *devs;
int i = 0, num_devs;
if ((devices && max_devices <= 0) || !num_devices)
return _eglError(EGL_BAD_PARAMETER, "eglQueryDevicesEXT");
mtx_lock(_eglGlobal.Mutex);
num_devs = _eglRefreshDeviceList();
devs = _eglGlobal.DeviceList;
/* bail early if we only care about the count */
if (!devices) {
*num_devices = num_devs;
goto out;
}
*num_devices = MIN2(num_devs, max_devices);
for (i = 0, dev = devs; i < *num_devices; i++) {
devices[i] = dev;
dev = dev->Next;
}
out:
mtx_unlock(_eglGlobal.Mutex);
return EGL_TRUE;
}
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