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/**************************************************************************
*
* Copyright 2015 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.
*
**************************************************************************/
#ifdef HAVE_LIBUDEV
#include <dlfcn.h>
#include <libudev.h>
#endif
#include "egldevice.h"
#include "eglglobals.h"
#include "egllog.h"
#include "egltypedefs.h"
typedef struct {
/* device list */
_EGLDevice *devices;
} _EGLDeviceInfo;
static _EGLDeviceInfo *
_eglEnsureDeviceInfo(void)
{
_EGLDeviceInfo *info;
mtx_lock(_eglGlobal.Mutex);
info = _eglGlobal.DeviceInfo;
if (!info) {
info = calloc(1, sizeof(_EGLDeviceInfo));
if (!info)
goto out;
info->devices = NULL;
_eglGlobal.DeviceInfo = info;
}
out:
mtx_unlock(_eglGlobal.Mutex);
return info;
}
/* TODO: this is all copied from loader.c. it should probably be put somewhere
* common so both there and here can use the same source. also, if it remains
* here, it needs a mutex.*/
#ifdef HAVE_LIBUDEV
static void *udev_handle = NULL;
static void *
udev_dlopen_handle(void)
{
if (!udev_handle) {
udev_handle = dlopen("libudev.so.1", RTLD_LOCAL | RTLD_LAZY);
if (!udev_handle) {
/* libudev.so.1 changed the return types of the two unref functions
* from voids to pointers. We don't use those return values, and the
* only ABI I've heard that cares about this kind of change (calling
* a function with a void * return that actually only returns void)
* might be ia64.
*/
udev_handle = dlopen("libudev.so.0", RTLD_LOCAL | RTLD_LAZY);
if (!udev_handle) {
_eglLog(_EGL_WARNING, "Couldn't dlopen libudev.so.1 or "
"libudev.so.0, device detection may be broken.\n");
}
}
}
return udev_handle;
}
static int dlsym_failed = 0;
static void *
checked_dlsym(void *dlopen_handle, const char *name)
{
void *result = dlsym(dlopen_handle, name);
if (!result)
dlsym_failed = 1;
return result;
}
#define UDEV_SYMBOL(ret, name, args) \
ret (*name) args = checked_dlsym(udev_dlopen_handle(), #name);
#endif /* HAVE_LIBUDEV */
/**
* Finish device management.
*/
void
_eglFiniDeviceInfo(void)
{
_EGLDeviceInfo *info;
_EGLDevice *device_list, *device;
/* atexit function is called with global mutex locked */
info = _eglGlobal.DeviceInfo;
if (!info)
return;
device_list = info->devices;
while (device_list) {
/* pop list head */
device = device_list;
device_list = device_list->Next;
free(device);
}
free(info);
_eglGlobal.DeviceInfo = NULL;
}
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