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