bdberl/c_src/bdberl_tpool.h

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/* -------------------------------------------------------------------
*
* bdberl: Thread Pool
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* Copyright (c) 2008-9 The Hive http://www.thehive.com/
* Authors: Dave "dizzyd" Smith <dizzyd@dizzyd.com>
* Phil Toland <phil.toland@gmail.com>
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* Jon Meredith <jon@jonmeredith.com>
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*
* 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.
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*
* ------------------------------------------------------------------- */
#ifndef _BDBERL_TPOOL_DRV
#define _BDBERL_TPOOL_DRV
#include "erl_driver.h"
typedef void (*TPoolJobFunc)(void* arg);
typedef struct _TPoolJob
{
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TPoolJobFunc main_fn; /* Function to invoke for this job */
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TPoolJobFunc cancel_fn; /* Function that gets invoked if job is canceled before it can run */
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void* arg; /* Input data for the function */
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unsigned int running; /* Flag indicating if the job is currently running */
unsigned int canceled; /* Flag indicating if the job was canceled */
struct _TPoolJob* next; /* Next job in the queue */
} TPoolJob;
typedef struct
{
ErlDrvMutex* lock;
ErlDrvCond* work_cv;
ErlDrvCond* cancel_cv;
TPoolJob* pending_jobs;
TPoolJob* last_pending_job;
TPoolJob* active_jobs;
unsigned int pending_job_count;
unsigned int active_job_count;
ErlDrvTid* threads;
unsigned int thread_count;
unsigned int active_threads;
unsigned int shutdown;
} TPool;
TPool* bdberl_tpool_start(unsigned int thread_count);
void bdberl_tpool_stop(TPool* tpool);
void bdberl_tpool_run(TPool* tpool, TPoolJobFunc main_fn, void* arg, TPoolJobFunc cancel_fn,
TPoolJob** job_ptr);
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void bdberl_tpool_cancel(TPool* tpool, TPoolJob* job);
void bdberl_tpool_job_count(TPool* tpool, unsigned int *pending_count_ptr,
unsigned int *active_count_ptr);
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#endif