tpool.h

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/**********************************
 * @author      Johan Hanssen Seferidis
 * License:     MIT
 *
 **********************************/

#pragma once

#if (__OpenBSD__)
// have to include pthread.h for pthread_mutex_t in OpenBSD with GCC 4.9.4
#include "pthread.h"
#endif

#ifdef __cplusplus
extern "C" {
#endif

// locks, max 512 threads
#define tpoolLockCount 512
extern pthread_mutex_t tpoolLocks[tpoolLockCount]; // only one thread can have the lock

// use lock in the tpoolLocks array
void tpoolLock(int position);
// unlock a lock in the tpoolLocks array
void tpoolUlock(int position);

typedef struct {
  union {
    char *s;
  };
  union {
    char *s2;
  };
  // return value
  union {
    char **list;
    int status;
  };
  void (*cb)(void*);
  void *cbArgs;
  void *channel;
} tpoolArgs;

#define tpoolAdd(task, args) tpool_add_work(tpool, task, args)
#define tpoolWait tpool_wait(tpool)
#define tpoolKill tpool_destroy(tpool)
#define tpoolPause tpool_pause(tpool)
#define tpoolResume tpool_resume(tpool)
#define tpoolNum tpool_num_threads_working(tpool)

/* =================================== API ======================================= */


typedef struct tpool_* threadpool;
extern threadpool tpool;

threadpool tpool_init(int num_threads);


int tpool_add_work(threadpool, void (*function_p)(void*), void* arg_p);


void tpool_wait(threadpool);


void tpool_pause(threadpool);


void tpool_resume(threadpool);


void tpool_destroy(threadpool);


int tpool_num_threads_working(threadpool);


#ifdef __cplusplus
}
#endif