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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2016 by Mike Erwin.
* All rights reserved.
*
* Contributor(s): Blender Foundation
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/gpu/intern/gwn_buffer_id.cpp
* \ingroup gpu
*
* Gawain buffer IDs
*/
#include "GPU_buffer_id.h"
#include <mutex>
#include <vector>
#define ORPHAN_DEBUG 0
#if ORPHAN_DEBUG
#include <cstdio>
#endif
static std::vector<GLuint> orphaned_buffer_ids;
static std::mutex orphan_mutex;
extern "C" {
extern int BLI_thread_is_main(void); /* Blender-specific function */
}
static bool thread_is_main()
{
/* "main" here means the GL context's thread */
return BLI_thread_is_main();
}
GLuint GWN_buf_id_alloc()
{
/* delete orphaned IDs */
orphan_mutex.lock();
if (!orphaned_buffer_ids.empty()) {
const auto orphaned_buffer_len = (uint)orphaned_buffer_ids.size();
#if ORPHAN_DEBUG
printf("deleting %u orphaned VBO%s\n", orphaned_buffer_len, orphaned_buffer_len == 1 ? "" : "s");
#endif
glDeleteBuffers(orphaned_buffer_len, orphaned_buffer_ids.data());
orphaned_buffer_ids.clear();
}
orphan_mutex.unlock();
GLuint new_buffer_id = 0;
glGenBuffers(1, &new_buffer_id);
return new_buffer_id;
}
void GWN_buf_id_free(GLuint buffer_id)
{
if (thread_is_main()) {
glDeleteBuffers(1, &buffer_id);
}
else {
/* add this ID to the orphaned list */
orphan_mutex.lock();
#if ORPHAN_DEBUG
printf("orphaning VBO %u\n", buffer_id);
#endif
orphaned_buffer_ids.emplace_back(buffer_id);
orphan_mutex.unlock();
}
}
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