thr_create.c (144921) | thr_create.c (145436) |
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1/* 2 * Copyright (c) 2003 Daniel M. Eischen <deischen@gdeb.com> 3 * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: --- 16 unchanged lines hidden (view full) --- 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * | 1/* 2 * Copyright (c) 2003 Daniel M. Eischen <deischen@gdeb.com> 3 * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: --- 16 unchanged lines hidden (view full) --- 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * |
33 * $FreeBSD: head/lib/libthr/thread/thr_create.c 144921 2005-04-12 03:00:28Z davidxu $ | 33 * $FreeBSD: head/lib/libthr/thread/thr_create.c 145436 2005-04-23 02:48:59Z davidxu $ |
34 */ 35 36#include <errno.h> 37#include <stdlib.h> 38#include <string.h> 39#include <stddef.h> 40#include <pthread.h> 41#include <sys/signalvar.h> --- 6 unchanged lines hidden (view full) --- 48static void thread_start(struct pthread *curthread); 49 50__weak_reference(_pthread_create, pthread_create); 51 52int 53_pthread_create(pthread_t * thread, const pthread_attr_t * attr, 54 void *(*start_routine) (void *), void *arg) 55{ | 34 */ 35 36#include <errno.h> 37#include <stdlib.h> 38#include <string.h> 39#include <stddef.h> 40#include <pthread.h> 41#include <sys/signalvar.h> --- 6 unchanged lines hidden (view full) --- 48static void thread_start(struct pthread *curthread); 49 50__weak_reference(_pthread_create, pthread_create); 51 52int 53_pthread_create(pthread_t * thread, const pthread_attr_t * attr, 54 void *(*start_routine) (void *), void *arg) 55{ |
56 ucontext_t uc; 57 sigset_t sigmask, oldsigmask; | |
58 struct pthread *curthread, *new_thread; | 56 struct pthread *curthread, *new_thread; |
57 struct thr_param param; |
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59 int ret = 0, locked; 60 61 _thr_check_init(); 62 63 /* 64 * Tell libc and others now they need lock to protect their data. 65 */ 66 if (_thr_isthreaded() == 0 && _thr_setthreaded(1)) 67 return (EAGAIN); 68 69 curthread = _get_curthread(); 70 if ((new_thread = _thr_alloc(curthread)) == NULL) 71 return (EAGAIN); 72 | 58 int ret = 0, locked; 59 60 _thr_check_init(); 61 62 /* 63 * Tell libc and others now they need lock to protect their data. 64 */ 65 if (_thr_isthreaded() == 0 && _thr_setthreaded(1)) 66 return (EAGAIN); 67 68 curthread = _get_curthread(); 69 if ((new_thread = _thr_alloc(curthread)) == NULL) 70 return (EAGAIN); 71 |
72 memset(¶m, 0, sizeof(param)); 73 |
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73 if (attr == NULL || *attr == NULL) 74 /* Use the default thread attributes: */ 75 new_thread->attr = _pthread_attr_default; 76 else 77 new_thread->attr = *(*attr); 78 if (new_thread->attr.sched_inherit == PTHREAD_INHERIT_SCHED) { 79 /* inherit scheduling contention scope */ 80 if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM) --- 22 unchanged lines hidden (view full) --- 103 * Write a magic value to the thread structure 104 * to help identify valid ones: 105 */ 106 new_thread->magic = THR_MAGIC; 107 new_thread->start_routine = start_routine; 108 new_thread->arg = arg; 109 new_thread->cancelflags = PTHREAD_CANCEL_ENABLE | 110 PTHREAD_CANCEL_DEFERRED; | 74 if (attr == NULL || *attr == NULL) 75 /* Use the default thread attributes: */ 76 new_thread->attr = _pthread_attr_default; 77 else 78 new_thread->attr = *(*attr); 79 if (new_thread->attr.sched_inherit == PTHREAD_INHERIT_SCHED) { 80 /* inherit scheduling contention scope */ 81 if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM) --- 22 unchanged lines hidden (view full) --- 104 * Write a magic value to the thread structure 105 * to help identify valid ones: 106 */ 107 new_thread->magic = THR_MAGIC; 108 new_thread->start_routine = start_routine; 109 new_thread->arg = arg; 110 new_thread->cancelflags = PTHREAD_CANCEL_ENABLE | 111 PTHREAD_CANCEL_DEFERRED; |
111 getcontext(&uc); 112 SIGFILLSET(uc.uc_sigmask); 113 uc.uc_stack.ss_sp = new_thread->attr.stackaddr_attr; 114 uc.uc_stack.ss_size = new_thread->attr.stacksize_attr; 115 makecontext(&uc, (void (*)(void))thread_start, 1, new_thread); 116 | |
117 /* 118 * Check if this thread is to inherit the scheduling 119 * attributes from its parent: 120 */ 121 if (new_thread->attr.sched_inherit == PTHREAD_INHERIT_SCHED) { 122 /* 123 * Copy the scheduling attributes. Lock the scheduling 124 * lock to get consistent scheduling parameters. --- 16 unchanged lines hidden (view full) --- 141 /* Initialize the mutex queue: */ 142 TAILQ_INIT(&new_thread->mutexq); 143 TAILQ_INIT(&new_thread->pri_mutexq); 144 145 /* Initialise hooks in the thread structure: */ 146 if (new_thread->attr.suspend == THR_CREATE_SUSPENDED) 147 new_thread->flags = THR_FLAGS_SUSPENDED; 148 new_thread->state = PS_RUNNING; | 112 /* 113 * Check if this thread is to inherit the scheduling 114 * attributes from its parent: 115 */ 116 if (new_thread->attr.sched_inherit == PTHREAD_INHERIT_SCHED) { 117 /* 118 * Copy the scheduling attributes. Lock the scheduling 119 * lock to get consistent scheduling parameters. --- 16 unchanged lines hidden (view full) --- 136 /* Initialize the mutex queue: */ 137 TAILQ_INIT(&new_thread->mutexq); 138 TAILQ_INIT(&new_thread->pri_mutexq); 139 140 /* Initialise hooks in the thread structure: */ 141 if (new_thread->attr.suspend == THR_CREATE_SUSPENDED) 142 new_thread->flags = THR_FLAGS_SUSPENDED; 143 new_thread->state = PS_RUNNING; |
149 /* 150 * Thread created by thr_create() inherits currrent thread 151 * sigmask, however, before new thread setup itself correctly, 152 * it can not handle signal, so we should masks all signals here. 153 */ 154 SIGFILLSET(sigmask); 155 SIGDELSET(sigmask, SIGTRAP); 156 __sys_sigprocmask(SIG_SETMASK, &sigmask, &oldsigmask); 157 new_thread->sigmask = oldsigmask; | 144 |
158 /* Add the new thread. */ 159 _thr_link(curthread, new_thread); 160 /* Return thread pointer eariler so that new thread can use it. */ 161 (*thread) = new_thread; 162 if (SHOULD_REPORT_EVENT(curthread, TD_CREATE)) { 163 THR_THREAD_LOCK(curthread, new_thread); 164 locked = 1; 165 } else 166 locked = 0; | 145 /* Add the new thread. */ 146 _thr_link(curthread, new_thread); 147 /* Return thread pointer eariler so that new thread can use it. */ 148 (*thread) = new_thread; 149 if (SHOULD_REPORT_EVENT(curthread, TD_CREATE)) { 150 THR_THREAD_LOCK(curthread, new_thread); 151 locked = 1; 152 } else 153 locked = 0; |
154 param.start_func = (void (*)(void *)) thread_start; 155 param.arg = new_thread; 156 param.stack_base = new_thread->attr.stackaddr_attr; 157 param.stack_size = new_thread->attr.stacksize_attr; 158 param.tls_base = (char *)new_thread->tcb; 159 param.tls_size = sizeof(struct tcb); 160 param.child_tid = &new_thread->tid; 161 param.parent_tid = &new_thread->tid; 162 param.flags = 0; 163 if (new_thread->attr.flags & PTHREAD_SCOPE_SYSTEM) 164 param.flags |= THR_SYSTEM_SCOPE; |
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167 /* Schedule the new thread. */ | 165 /* Schedule the new thread. */ |
168 ret = thr_create(&uc, &new_thread->tid, 0); 169 __sys_sigprocmask(SIG_SETMASK, &oldsigmask, NULL); | 166 ret = thr_new(¶m, sizeof(param)); |
170 if (ret != 0) { 171 if (locked) 172 THR_THREAD_UNLOCK(curthread, new_thread); 173 _thr_unlink(curthread, new_thread); 174 free_thread(curthread, new_thread); 175 (*thread) = 0; 176 ret = EAGAIN; 177 } else if (locked) { --- 36 unchanged lines hidden (view full) --- 214 _thr_stack_free(pattr); 215 THREAD_LIST_UNLOCK(curthread); 216 } 217} 218 219static void 220thread_start(struct pthread *curthread) 221{ | 167 if (ret != 0) { 168 if (locked) 169 THR_THREAD_UNLOCK(curthread, new_thread); 170 _thr_unlink(curthread, new_thread); 171 free_thread(curthread, new_thread); 172 (*thread) = 0; 173 ret = EAGAIN; 174 } else if (locked) { --- 36 unchanged lines hidden (view full) --- 211 _thr_stack_free(pattr); 212 THREAD_LIST_UNLOCK(curthread); 213 } 214} 215 216static void 217thread_start(struct pthread *curthread) 218{ |
222 _tcb_set(curthread->tcb); 223 224 /* Thread was created with all signals blocked, unblock them. */ 225 __sys_sigprocmask(SIG_SETMASK, &curthread->sigmask, NULL); 226 | |
227 if (curthread->flags & THR_FLAGS_NEED_SUSPEND) 228 _thr_suspend_check(curthread); 229 230 THR_LOCK(curthread); 231 THR_UNLOCK(curthread); 232 233 /* Run the current thread's start routine with argument: */ 234 pthread_exit(curthread->start_routine(curthread->arg)); 235 236 /* This point should never be reached. */ 237 PANIC("Thread has resumed after exit"); 238} | 219 if (curthread->flags & THR_FLAGS_NEED_SUSPEND) 220 _thr_suspend_check(curthread); 221 222 THR_LOCK(curthread); 223 THR_UNLOCK(curthread); 224 225 /* Run the current thread's start routine with argument: */ 226 pthread_exit(curthread->start_routine(curthread->arg)); 227 228 /* This point should never be reached. */ 229 PANIC("Thread has resumed after exit"); 230} |