mirror of
https://github.com/godotengine/godot
synced 2024-09-05 05:18:29 +00:00
![Pedro J. Estébanez](/assets/img/avatar_default.png)
- Removed platform-specific implementations. - Now all semaphores are in-object, unless they need to be conditionally created. - Similarly to `Mutex`, provided a dummy implementation for when `NO_THREADS` is defined. - Similarly to `Mutex`, methods are made `const` for easy use in such contexts. - Language bindings updated: `wait()` and `post()` are now `void`. - Language bindings updated: `try_wait()` added. Bonus: - Rewritten the `#ifdef` in `mutex.h` to meet the code style.
125 lines
3.6 KiB
C++
125 lines
3.6 KiB
C++
/*************************************************************************/
|
|
/* command_queue_mt.cpp */
|
|
/*************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://godotengine.org */
|
|
/*************************************************************************/
|
|
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
|
|
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
|
|
/* */
|
|
/* 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, sublicense, 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 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 "command_queue_mt.h"
|
|
|
|
#include "core/os/os.h"
|
|
|
|
void CommandQueueMT::lock() {
|
|
|
|
mutex.lock();
|
|
}
|
|
|
|
void CommandQueueMT::unlock() {
|
|
|
|
mutex.unlock();
|
|
}
|
|
|
|
void CommandQueueMT::wait_for_flush() {
|
|
|
|
// wait one millisecond for a flush to happen
|
|
OS::get_singleton()->delay_usec(1000);
|
|
}
|
|
|
|
CommandQueueMT::SyncSemaphore *CommandQueueMT::_alloc_sync_sem() {
|
|
|
|
int idx = -1;
|
|
|
|
while (true) {
|
|
|
|
lock();
|
|
for (int i = 0; i < SYNC_SEMAPHORES; i++) {
|
|
|
|
if (!sync_sems[i].in_use) {
|
|
sync_sems[i].in_use = true;
|
|
idx = i;
|
|
break;
|
|
}
|
|
}
|
|
unlock();
|
|
|
|
if (idx == -1) {
|
|
wait_for_flush();
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return &sync_sems[idx];
|
|
}
|
|
|
|
bool CommandQueueMT::dealloc_one() {
|
|
tryagain:
|
|
if (dealloc_ptr == write_ptr) {
|
|
// The queue is empty
|
|
return false;
|
|
}
|
|
|
|
uint32_t size = *(uint32_t *)&command_mem[dealloc_ptr];
|
|
|
|
if (size == 0) {
|
|
// End of command buffer wrap down
|
|
dealloc_ptr = 0;
|
|
goto tryagain;
|
|
}
|
|
|
|
if (size & 1) {
|
|
// Still used, nothing can be deallocated
|
|
return false;
|
|
}
|
|
|
|
dealloc_ptr += (size >> 1) + 8;
|
|
return true;
|
|
}
|
|
|
|
CommandQueueMT::CommandQueueMT(bool p_sync) {
|
|
|
|
read_ptr = 0;
|
|
write_ptr = 0;
|
|
dealloc_ptr = 0;
|
|
command_mem = (uint8_t *)memalloc(COMMAND_MEM_SIZE);
|
|
|
|
for (int i = 0; i < SYNC_SEMAPHORES; i++) {
|
|
|
|
sync_sems[i].in_use = false;
|
|
}
|
|
if (p_sync)
|
|
sync = memnew(Semaphore);
|
|
else
|
|
sync = NULL;
|
|
}
|
|
|
|
CommandQueueMT::~CommandQueueMT() {
|
|
|
|
if (sync)
|
|
memdelete(sync);
|
|
memfree(command_mem);
|
|
}
|