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/*
* Copyright (c) 2004, 2005 Voltaire, Inc. All rights reserved.
* Copyright (c) 2002-2005 Mellanox Technologies LTD. All rights reserved.
* Copyright (c) 1996-2003 Intel Corporation. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* 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.
*
*/
#if HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <stdio.h>
#include <unistd.h>
#include <complib/cl_thread.h>
/*
* Internal function to run a new user mode thread.
* This function is always run as a result of creation a new user mode thread.
* Its main job is to synchronize the creation and running of the new thread.
*/
static void *__cl_thread_wrapper(void *arg)
{
cl_thread_t *p_thread = (cl_thread_t *) arg;
CL_ASSERT(p_thread);
CL_ASSERT(p_thread->pfn_callback);
p_thread->pfn_callback((void *)p_thread->context);
return (NULL);
}
void cl_thread_construct(IN cl_thread_t * const p_thread)
{
CL_ASSERT(p_thread);
p_thread->osd.state = CL_UNINITIALIZED;
}
cl_status_t
cl_thread_init(IN cl_thread_t * const p_thread,
IN cl_pfn_thread_callback_t pfn_callback,
IN const void *const context, IN const char *const name)
{
int ret;
CL_ASSERT(p_thread);
cl_thread_construct(p_thread);
/* Initialize the thread structure */
p_thread->pfn_callback = pfn_callback;
p_thread->context = context;
ret = pthread_create(&p_thread->osd.id, NULL,
__cl_thread_wrapper, (void *)p_thread);
if (ret != 0) /* pthread_create returns a "0" for success */
return (CL_ERROR);
p_thread->osd.state = CL_INITIALIZED;
return (CL_SUCCESS);
}
void cl_thread_destroy(IN cl_thread_t * const p_thread)
{
CL_ASSERT(p_thread);
CL_ASSERT(cl_is_state_valid(p_thread->osd.state));
if (p_thread->osd.state == CL_INITIALIZED)
pthread_join(p_thread->osd.id, NULL);
p_thread->osd.state = CL_UNINITIALIZED;
}
void cl_thread_suspend(IN const uint32_t pause_ms)
{
/* Convert to micro seconds */
usleep(pause_ms * 1000);
}
void cl_thread_stall(IN const uint32_t pause_us)
{
/*
* Not quite a busy wait, but Linux is lacking in terms of high
* resolution time stamp information in user mode.
*/
usleep(pause_us);
}
int cl_proc_count(void)
{
uint32_t ret;
ret = sysconf(_SC_NPROCESSORS_ONLN);
if (!ret)
return 1; /* Workaround for PPC where get_nprocs() returns 0 */
return ret;
}
boolean_t cl_is_current_thread(IN const cl_thread_t * const p_thread)
{
pthread_t current;
CL_ASSERT(p_thread);
CL_ASSERT(p_thread->osd.state == CL_INITIALIZED);
current = pthread_self();
return (pthread_equal(current, p_thread->osd.id));
}
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