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/*
* Copyright © 2012 Intel Corporation
*
* 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 (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.
*/
#ifndef _GLTHREAD_H
#define _GLTHREAD_H
#include "main/mtypes.h"
/* Command size is a number of bytes stored in a short. */
#define MARSHAL_MAX_CMD_SIZE 65535
#ifdef HAVE_PTHREAD
#include <inttypes.h>
#include <stdbool.h>
#include <pthread.h>
enum marshal_dispatch_cmd_id;
struct glthread_state
{
/** The worker thread that asynchronously processes our GL commands. */
pthread_t thread;
/**
* Mutex used for synchronizing between the main thread and the worker
* thread.
*/
pthread_mutex_t mutex;
/** Condvar used for waking the worker thread. */
pthread_cond_t new_work;
/** Condvar used for waking the main thread. */
pthread_cond_t work_done;
/** Used to tell the worker thread to quit */
bool shutdown;
/** Indicates that the worker thread is currently processing a batch */
bool busy;
/**
* Singly-linked list of command batches that are awaiting execution by
* a thread pool task. NULL if empty.
*/
struct glthread_batch *batch_queue;
/**
* Tail pointer for appending batches to the end of batch_queue. If the
* queue is empty, this points to batch_queue.
*/
struct glthread_batch **batch_queue_tail;
/**
* Batch containing commands that are being prepared for insertion into
* batch_queue. NULL if there are no such commands.
*
* Since this is only used by the main thread, it doesn't need the mutex to
* be accessed.
*/
struct glthread_batch *batch;
/**
* Tracks on the main thread side whether the current vertex array binding
* is in a VBO.
*/
bool vertex_array_is_vbo;
/**
* Tracks on the main thread side whether the current element array (index
* buffer) binding is in a VBO.
*/
bool element_array_is_vbo;
};
/**
* A single batch of commands queued up for later execution by a thread pool
* task.
*/
struct glthread_batch
{
/**
* Next batch of commands to execute after this batch, or NULL if this is
* the last set of commands queued. Protected by ctx->Marshal.Mutex.
*/
struct glthread_batch *next;
/**
* Amount of data used by batch commands, in bytes.
*/
size_t used;
/**
* Data contained in the command buffer.
*/
uint8_t buffer[MARSHAL_MAX_CMD_SIZE];
};
void _mesa_glthread_init(struct gl_context *ctx);
void _mesa_glthread_destroy(struct gl_context *ctx);
void _mesa_glthread_restore_dispatch(struct gl_context *ctx);
void _mesa_glthread_flush_batch(struct gl_context *ctx);
void _mesa_glthread_finish(struct gl_context *ctx);
#else /* HAVE_PTHREAD */
static inline void
_mesa_glthread_init(struct gl_context *ctx)
{
}
static inline void
_mesa_glthread_destroy(struct gl_context *ctx)
{
}
static inline void
_mesa_glthread_finish(struct gl_context *ctx)
{
}
static inline void
_mesa_glthread_restore_dispatch(struct gl_context *ctx)
{
}
static inline void
_mesa_glthread_flush_batch(struct gl_context *ctx)
{
}
#endif /* !HAVE_PTHREAD */
#endif /* _GLTHREAD_H*/
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