99 lines
3.1 KiB
C
99 lines
3.1 KiB
C
/* -------------------------------------------------------------------
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*
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* bdberl: Thread Pool
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* Copyright (c) 2008-9 The Hive http://www.thehive.com/
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* Authors: Dave "dizzyd" Smith <dizzyd@dizzyd.com>
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* Phil Toland <phil.toland@gmail.com>
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* Jon Meredith <jon@jonmeredith.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* ------------------------------------------------------------------- */
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#ifndef _BDBERL_TPOOL_DRV
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#define _BDBERL_TPOOL_DRV
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#include "erl_driver.h"
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typedef void (*TPoolJobFunc)(void* arg);
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typedef struct _TPoolJob
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{
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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 */
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unsigned int canceled; /* Flag indicating if the job was canceled */
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struct _TPoolJob* next; /* Next job in the queue */
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} TPoolJob;
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typedef struct
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{
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ErlDrvMutex* lock;
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ErlDrvCond* work_cv;
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ErlDrvCond* cancel_cv;
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TPoolJob* pending_jobs;
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TPoolJob* last_pending_job;
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TPoolJob* active_jobs;
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unsigned int pending_job_count;
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unsigned int active_job_count;
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ErlDrvTid* threads;
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unsigned int thread_count;
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unsigned int active_threads;
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unsigned int shutdown;
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} TPool;
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TPool* bdberl_tpool_start(unsigned int thread_count);
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void bdberl_tpool_stop(TPool* tpool);
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void bdberl_tpool_run(TPool* tpool, TPoolJobFunc main_fn, void* arg, TPoolJobFunc cancel_fn,
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TPoolJob** job_ptr);
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void bdberl_tpool_cancel(TPool* tpool, TPoolJob* job);
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void bdberl_tpool_job_count(TPool* tpool, unsigned int *pending_count_ptr,
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unsigned int *active_count_ptr);
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void bdberl_tpool_thread_id(DB_ENV *env, pid_t *pid, db_threadid_t *tid);
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char *bdberl_tpool_thread_id_string(DB_ENV *dbenv, pid_t pid, db_threadid_t tid, char *buf);
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int bdberl_tpool_thread_is_alive(DB_ENV *dbenv, pid_t pid, db_threadid_t tid, u_int32_t flags);
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#endif
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