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/*
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* Copyright (c) 2004, 2005 Voltaire, Inc. All rights reserved.
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* Copyright (c) 2002-2005 Mellanox Technologies LTD. All rights reserved.
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* Copyright (c) 1996-2003 Intel Corporation. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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#if HAVE_CONFIG_H
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# include <config.h>
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#endif /* HAVE_CONFIG_H */
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/sysinfo.h>
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#include <complib/cl_thread.h>
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/*
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* Internal function to run a new user mode thread.
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* This function is always run as a result of creation a new user mode thread.
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* Its main job is to synchronize the creation and running of the new thread.
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*/
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static void *__cl_thread_wrapper(void *arg)
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{
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cl_thread_t *p_thread = (cl_thread_t *) arg;
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CL_ASSERT(p_thread);
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CL_ASSERT(p_thread->pfn_callback);
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p_thread->pfn_callback((void *)p_thread->context);
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return (NULL);
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}
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void cl_thread_construct(IN cl_thread_t * const p_thread)
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{
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CL_ASSERT(p_thread);
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p_thread->osd.state = CL_UNINITIALIZED;
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}
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cl_status_t cl_thread_init(IN cl_thread_t * const p_thread,
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IN cl_pfn_thread_callback_t pfn_callback,
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IN const void *const context,
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IN const char *const name)
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{
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int ret;
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CL_ASSERT(p_thread);
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cl_thread_construct(p_thread);
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/* Initialize the thread structure */
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p_thread->pfn_callback = pfn_callback;
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p_thread->context = context;
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ret = pthread_create(&p_thread->osd.id, NULL,
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__cl_thread_wrapper, (void *)p_thread);
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if (ret != 0) /* pthread_create returns a "0" for success */
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return (CL_ERROR);
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p_thread->osd.state = CL_INITIALIZED;
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return (CL_SUCCESS);
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}
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void cl_thread_destroy(IN cl_thread_t * const p_thread)
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{
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CL_ASSERT(p_thread);
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CL_ASSERT(cl_is_state_valid(p_thread->osd.state));
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if (p_thread->osd.state == CL_INITIALIZED)
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pthread_join(p_thread->osd.id, NULL);
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p_thread->osd.state = CL_UNINITIALIZED;
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}
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void cl_thread_suspend(IN const uint32_t pause_ms)
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{
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/* Convert to micro seconds */
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usleep(pause_ms * 1000);
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}
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void cl_thread_stall(IN const uint32_t pause_us)
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{
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/*
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* Not quite a busy wait, but Linux is lacking in terms of high
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* resolution time stamp information in user mode.
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*/
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usleep(pause_us);
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}
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int cl_proc_count(void)
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{
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uint32_t ret;
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ret = get_nprocs();
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if (!ret)
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return 1; /* Workaround for PPC where get_nprocs() returns 0 */
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return ret;
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}
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boolean_t cl_is_current_thread(IN const cl_thread_t * const p_thread)
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{
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pthread_t current;
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CL_ASSERT(p_thread);
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CL_ASSERT(p_thread->osd.state == CL_INITIALIZED);
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current = pthread_self();
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return (pthread_equal(current, p_thread->osd.id));
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}
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