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/*
* Copyright © 2016 Advanced Micro Devices, Inc.
* 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 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
* NON-INFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS, AUTHORS
* AND/OR ITS SUPPLIERS 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.
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*/
/* Job queue with execution in a separate thread.
*
* Jobs can be added from any thread. After that, the wait call can be used
* to wait for completion of the job.
*/
#ifndef U_QUEUE_H
#define U_QUEUE_H
#include "os/os_thread.h"
/* Job completion fence.
* Put this into your job structure.
*/
struct util_queue_fence {
pipe_mutex mutex;
pipe_condvar cond;
int signalled;
};
struct util_queue_job {
void *job;
struct util_queue_fence *fence;
};
/* Put this into your context. */
struct util_queue {
pipe_mutex lock;
pipe_semaphore has_space;
pipe_semaphore queued;
pipe_thread thread;
int kill_thread;
int max_jobs;
int write_idx, read_idx; /* ring buffer pointers */
struct util_queue_job *jobs;
void (*execute_job)(void *job);
};
bool util_queue_init(struct util_queue *queue,
unsigned max_jobs,
void (*execute_job)(void *));
void util_queue_destroy(struct util_queue *queue);
void util_queue_fence_init(struct util_queue_fence *fence);
void util_queue_fence_destroy(struct util_queue_fence *fence);
void util_queue_add_job(struct util_queue *queue,
void *job,
struct util_queue_fence *fence);
void util_queue_job_wait(struct util_queue_fence *fence);
/* util_queue needs to be cleared to zeroes for this to work */
static inline bool
util_queue_is_initialized(struct util_queue *queue)
{
return queue->thread != 0;
}
static inline bool
util_queue_fence_is_signalled(struct util_queue_fence *fence)
{
return fence->signalled != 0;
}
#endif
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