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/*
* Copyright (C) 2013-2020 Argonne National Laboratory, Department of Energy,
* UChicago Argonne, LLC and The HDF Group.
* All rights reserved.
*
* The full copyright notice, including terms governing use, modification,
* and redistribution, is contained in the COPYING file that can be
* found at the root of the source code distribution tree.
*/
#ifndef MERCURY_THREAD_H
#define MERCURY_THREAD_H
#if !defined(_WIN32) && !defined(_GNU_SOURCE)
#define _GNU_SOURCE
#endif
#include "mercury_util_config.h"
#ifdef _WIN32
#include <windows.h>
typedef HANDLE hg_thread_t;
typedef LPTHREAD_START_ROUTINE hg_thread_func_t;
typedef DWORD hg_thread_ret_t;
#define HG_THREAD_RETURN_TYPE hg_thread_ret_t WINAPI
typedef DWORD hg_thread_key_t;
typedef DWORD_PTR hg_cpu_set_t;
#else
#include <pthread.h>
typedef pthread_t hg_thread_t;
typedef void *(*hg_thread_func_t)(void *);
typedef void * hg_thread_ret_t;
#define HG_THREAD_RETURN_TYPE hg_thread_ret_t
typedef pthread_key_t hg_thread_key_t;
#ifdef __APPLE__
/* Size definition for CPU sets. */
#define HG_CPU_SETSIZE 1024
#define HG_NCPUBITS (8 * sizeof(hg_cpu_mask_t))
/* Type for array elements in 'cpu_set_t'. */
typedef hg_util_uint64_t hg_cpu_mask_t;
typedef struct {
hg_cpu_mask_t bits[HG_CPU_SETSIZE / HG_NCPUBITS];
} hg_cpu_set_t;
#else
typedef cpu_set_t hg_cpu_set_t;
#endif
#endif
#ifdef __cplusplus
extern "C" {
#endif
/**
* Initialize the thread.
*
* \param thread [IN/OUT] pointer to thread object
*/
HG_UTIL_PUBLIC void hg_thread_init(hg_thread_t *thread);
/**
* Create a new thread for the given function.
*
* \param thread [IN/OUT] pointer to thread object
* \param f [IN] pointer to function
* \param data [IN] pointer to data than be passed to function f
*
* \return Non-negative on success or negative on failure
*/
HG_UTIL_PUBLIC int hg_thread_create(hg_thread_t *thread, hg_thread_func_t f, void *data);
/**
* Ends the calling thread.
*
* \param ret [IN] exit code for the thread
*
* \return Non-negative on success or negative on failure
*/
HG_UTIL_PUBLIC void hg_thread_exit(hg_thread_ret_t ret);
/**
* Wait for thread completion.
*
* \param thread [IN] thread object
*
* \return Non-negative on success or negative on failure
*/
HG_UTIL_PUBLIC int hg_thread_join(hg_thread_t thread);
/**
* Terminate the thread.
*
* \param thread [IN] thread object
*
* \return Non-negative on success or negative on failure
*/
HG_UTIL_PUBLIC int hg_thread_cancel(hg_thread_t thread);
/**
* Yield the processor.
*
* \return Non-negative on success or negative on failure
*/
HG_UTIL_PUBLIC int hg_thread_yield(void);
/**
* Obtain handle of the calling thread.
*
* \return
*/
static HG_UTIL_INLINE hg_thread_t hg_thread_self(void);
/**
* Compare thread IDs.
*
* \return Non-zero if equal, zero if not equal
*/
static HG_UTIL_INLINE int hg_thread_equal(hg_thread_t t1, hg_thread_t t2);
/**
* Create a thread-specific data key visible to all threads in the process.
*
* \param key [OUT] pointer to thread key object
*
* \return Non-negative on success or negative on failure
*/
HG_UTIL_PUBLIC int hg_thread_key_create(hg_thread_key_t *key);
/**
* Delete a thread-specific data key previously returned by
* hg_thread_key_create().
*
* \param key [IN] thread key object
*
* \return Non-negative on success or negative on failure
*/
HG_UTIL_PUBLIC int hg_thread_key_delete(hg_thread_key_t key);
/**
* Get value from specified key.
*
* \param key [IN] thread key object
*
* \return Pointer to data associated to the key
*/
static HG_UTIL_INLINE void *hg_thread_getspecific(hg_thread_key_t key);
/**
* Set value to specified key.
*
* \param key [IN] thread key object
* \param value [IN] pointer to data that will be associated
*
* \return Non-negative on success or negative on failure
*/
static HG_UTIL_INLINE int hg_thread_setspecific(hg_thread_key_t key, const void *value);
/**
* Get affinity mask.
*
* \param thread [IN] thread object
* \param cpu_mask [IN/OUT] cpu mask
*
* \return Non-negative on success or negative on failure
*/
HG_UTIL_PUBLIC int hg_thread_getaffinity(hg_thread_t thread, hg_cpu_set_t *cpu_mask);
/**
* Set affinity mask.
*
* \param thread [IN] thread object
* \param cpu_mask [IN] cpu mask
*
* \return Non-negative on success or negative on failure
*/
HG_UTIL_PUBLIC int hg_thread_setaffinity(hg_thread_t thread, const hg_cpu_set_t *cpu_mask);
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE hg_thread_t
hg_thread_self(void)
{
#ifdef _WIN32
return GetCurrentThread();
#else
return pthread_self();
#endif
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE int
hg_thread_equal(hg_thread_t t1, hg_thread_t t2)
{
#ifdef _WIN32
return GetThreadId(t1) == GetThreadId(t2);
#else
return pthread_equal(t1, t2);
#endif
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE void *
hg_thread_getspecific(hg_thread_key_t key)
{
#ifdef _WIN32
return TlsGetValue(key);
#else
return pthread_getspecific(key);
#endif
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE int
hg_thread_setspecific(hg_thread_key_t key, const void *value)
{
#ifdef _WIN32
if (!TlsSetValue(key, (LPVOID)value))
return HG_UTIL_FAIL;
#else
if (pthread_setspecific(key, value))
return HG_UTIL_FAIL;
#endif
return HG_UTIL_SUCCESS;
}
#ifdef __cplusplus
}
#endif
#endif /* MERCURY_THREAD_H */
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