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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:expandtab:shiftwidth=4:tabstop=4:
*/
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#include "mozilla/Types.h"
#include "prlink.h"
#include <gbm/gbm.h>
#define GET_FUNC(func, lib) \
func##_fn = \
(decltype(func##_fn))PR_FindFunctionSymbol(lib, #func) \
#define IS_FUNC_LOADED(func) \
(func != nullptr) \
static struct gbm_device * (*gbm_create_device_fn)(int fd);
static void (*gbm_device_destroy_fn)(struct gbm_device* gbm);
bool IsGBMLibraryLoaded() {
static bool isLoaded =
(IS_FUNC_LOADED(gbm_create_device_fn) &&
IS_FUNC_LOADED(gbm_device_destroy_fn));
return isLoaded;
}
bool LoadGBMLibrary() {
static PRLibrary* gbmLib = nullptr;
static bool gbmInitialized = false;
//TODO Thread safe
if (!gbmInitialized) {
gbmInitialized = true;
gbmLib = PR_LoadLibrary("libgbm.so.1");
if (!gbmLib) {
return false;
}
GET_FUNC(gbm_create_device, gbmLib);
GET_FUNC(gbm_device_destroy, gbmLib);
}
return IsGBMLibraryLoaded();
}
struct gbm_device *
gbm_create_device(int fd)
{
if (!LoadGBMLibrary()) {
return nullptr;
}
return gbm_create_device_fn(fd);
}
void
gbm_device_destroy(struct gbm_device* gbm)
{
if (!LoadGBMLibrary()) {
return;
}
return gbm_device_destroy_fn(gbm);
}