1 /* 2 * Copyright (c) 2004, 2005 Voltaire, Inc. All rights reserved. 3 * Copyright (c) 2002-2005 Mellanox Technologies LTD. All rights reserved. 4 * Copyright (c) 1996-2003 Intel Corporation. All rights reserved. 5 * 6 * This software is available to you under a choice of one of two 7 * licenses. You may choose to be licensed under the terms of the GNU 8 * General Public License (GPL) Version 2, available from the file 9 * COPYING in the main directory of this source tree, or the 10 * OpenIB.org BSD license below: 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer. 19 * 20 * - Redistributions in binary form must reproduce the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer in the documentation and/or other materials 23 * provided with the distribution. 24 * 25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 32 * SOFTWARE. 33 * 34 */ 35 36 #if HAVE_CONFIG_H 37 # include <config.h> 38 #endif /* HAVE_CONFIG_H */ 39 40 #include <complib/cl_spinlock.h> 41 42 void cl_spinlock_construct(IN cl_spinlock_t * const p_spinlock) 43 { 44 CL_ASSERT(p_spinlock); 45 46 p_spinlock->state = CL_UNINITIALIZED; 47 } 48 49 cl_status_t cl_spinlock_init(IN cl_spinlock_t * const p_spinlock) 50 { 51 CL_ASSERT(p_spinlock); 52 53 cl_spinlock_construct(p_spinlock); 54 55 /* Initialize with pthread_mutexattr_t = NULL */ 56 if (pthread_mutex_init(&p_spinlock->mutex, NULL)) 57 return (CL_ERROR); 58 59 p_spinlock->state = CL_INITIALIZED; 60 return (CL_SUCCESS); 61 } 62 63 void cl_spinlock_destroy(IN cl_spinlock_t * const p_spinlock) 64 { 65 CL_ASSERT(p_spinlock); 66 CL_ASSERT(cl_is_state_valid(p_spinlock->state)); 67 68 if (p_spinlock->state == CL_INITIALIZED) { 69 p_spinlock->state = CL_UNINITIALIZED; 70 pthread_mutex_lock(&p_spinlock->mutex); 71 pthread_mutex_unlock(&p_spinlock->mutex); 72 pthread_mutex_destroy(&p_spinlock->mutex); 73 } 74 p_spinlock->state = CL_UNINITIALIZED; 75 } 76 77 void cl_spinlock_acquire(IN cl_spinlock_t * const p_spinlock) 78 { 79 CL_ASSERT(p_spinlock); 80 CL_ASSERT(p_spinlock->state == CL_INITIALIZED); 81 82 pthread_mutex_lock(&p_spinlock->mutex); 83 } 84 85 void cl_spinlock_release(IN cl_spinlock_t * const p_spinlock) 86 { 87 CL_ASSERT(p_spinlock); 88 CL_ASSERT(p_spinlock->state == CL_INITIALIZED); 89 90 pthread_mutex_unlock(&p_spinlock->mutex); 91 } 92