comparison: src/server/util/systhr.c
src/server/util/systhr.c
- changeset 14
- b8bf95b39952
- parent 1
- 3c066d52342d
- child 29
- e8619defde14
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| 13:1fdbf4170ef4 | 14:b8bf95b39952 |
|---|---|
| 1 /* | |
| 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. | |
| 3 * | |
| 4 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. | |
| 5 * | |
| 6 * THE BSD LICENSE | |
| 7 * | |
| 8 * Redistribution and use in source and binary forms, with or without | |
| 9 * modification, are permitted provided that the following conditions are met: | |
| 10 * | |
| 11 * Redistributions of source code must retain the above copyright notice, this | |
| 12 * list of conditions and the following disclaimer. | |
| 13 * Redistributions in binary form must reproduce the above copyright notice, | |
| 14 * this list of conditions and the following disclaimer in the documentation | |
| 15 * and/or other materials provided with the distribution. | |
| 16 * | |
| 17 * Neither the name of the nor the names of its contributors may be | |
| 18 * used to endorse or promote products derived from this software without | |
| 19 * specific prior written permission. | |
| 20 * | |
| 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER | |
| 25 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; | |
| 28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | |
| 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR | |
| 30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF | |
| 31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 32 */ | |
| 33 | |
| 34 /* | |
| 35 * systhr.c: Abstracted threading mechanisms | |
| 36 * | |
| 37 * Rob McCool | |
| 38 */ | |
| 39 | |
| 40 | |
| 41 #include "systhr.h" | |
| 42 #include "ereport.h" | |
| 43 | |
| 44 #include "prinit.h" | |
| 45 #include "prthread.h" | |
| 46 #include "private/pprthred.h" | |
| 47 | |
| 48 #include "systems.h" | |
| 49 | |
| 50 #ifdef XP_UNIX | |
| 51 #include <poll.h> | |
| 52 #endif | |
| 53 | |
| 54 #ifdef THREAD_WIN32 | |
| 55 #include <process.h> | |
| 56 | |
| 57 typedef struct { | |
| 58 HANDLE hand; | |
| 59 DWORD id; | |
| 60 } sys_thread_s; | |
| 61 | |
| 62 #endif | |
| 63 | |
| 64 #define DEFAULT_STACKSIZE (64*1024) | |
| 65 | |
| 66 static unsigned long _systhr_stacksize = DEFAULT_STACKSIZE; | |
| 67 | |
| 68 NSAPI_PUBLIC | |
| 69 void systhread_set_default_stacksize(unsigned long size) | |
| 70 { | |
| 71 _systhr_stacksize = size; | |
| 72 } | |
| 73 | |
| 74 NSAPI_PUBLIC | |
| 75 SYS_THREAD systhread_start(int prio, int stksz, thrstartfunc fn, void *arg) | |
| 76 { | |
| 77 PRThread *ret = PR_CreateThread(PR_USER_THREAD, (void (*)(void *))fn, | |
| 78 (void *)arg, (PRThreadPriority)prio, | |
| 79 PR_GLOBAL_THREAD, PR_UNJOINABLE_THREAD, | |
| 80 stksz ? stksz : _systhr_stacksize); | |
| 81 return (void *) ret; | |
| 82 } | |
| 83 | |
| 84 | |
| 85 NSAPI_PUBLIC SYS_THREAD systhread_current(void) | |
| 86 { | |
| 87 return PR_GetCurrentThread(); | |
| 88 } | |
| 89 | |
| 90 NSAPI_PUBLIC void systhread_yield(void) | |
| 91 { | |
| 92 PR_Sleep(PR_INTERVAL_NO_WAIT); | |
| 93 } | |
| 94 | |
| 95 | |
| 96 NSAPI_PUBLIC void systhread_timerset(int usec) | |
| 97 { | |
| 98 /* This is an interesting problem. If you ever do turn on interrupts | |
| 99 * on the server, you're in for lots of fun with NSPR Threads | |
| 100 PR_StartEvents(usec); */ | |
| 101 } | |
| 102 | |
| 103 | |
| 104 NSAPI_PUBLIC | |
| 105 SYS_THREAD systhread_attach(void) | |
| 106 { | |
| 107 PRThread *ret; | |
| 108 ret = PR_AttachThread(PR_USER_THREAD, PR_PRIORITY_NORMAL, NULL); | |
| 109 | |
| 110 return (void *) ret; | |
| 111 } | |
| 112 | |
| 113 NSAPI_PUBLIC | |
| 114 void systhread_detach(SYS_THREAD thr) | |
| 115 { | |
| 116 /* XXXMB - this is not correct! */ | |
| 117 PR_DetachThread(); | |
| 118 } | |
| 119 | |
| 120 NSAPI_PUBLIC void systhread_terminate(SYS_THREAD thr) | |
| 121 { | |
| 122 PR_Interrupt((PRThread *)thr); | |
| 123 } | |
| 124 | |
| 125 NSAPI_PUBLIC void systhread_sleep(int milliseconds) | |
| 126 { | |
| 127 #ifdef XP_WIN32 | |
| 128 PR_Sleep(PR_MillisecondsToInterval(milliseconds)); | |
| 129 #else | |
| 130 /* poll() is more efficient than PR_Sleep() */ | |
| 131 if (milliseconds > 0) | |
| 132 poll(NULL, NULL, milliseconds); | |
| 133 #endif | |
| 134 } | |
| 135 | |
| 136 NSAPI_PUBLIC void systhread_init(char *name) | |
| 137 { | |
| 138 if (!PR_Initialized()) { | |
| 139 PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 256); | |
| 140 } | |
| 141 // XXX: ruslan - this bug can potentially exist on all plafroms due to | |
| 142 // possible priority inversion on NSPR spin locks. This code will | |
| 143 // need to be remove as we get new NSPR drop | |
| 144 // <WORKAROUND> | |
| 145 /* VB: This is to fix bug# 364813 coupled with NSPR not wanting to patch | |
| 146 their problems. The fix is to prevent NSPR itself from | |
| 147 using atomic stacks. | |
| 148 */ | |
| 149 // ruslan: this problem exists on DEC also. We will roll it back when | |
| 150 // we have the right fix from NSPR group. It has smth. to do with | |
| 151 // atomic operations on DEC, it's an assembly code which is different | |
| 152 // for every platform. NSPR_FD_CACHE_SIZE_HIGH env var will cause the | |
| 153 // same effect as this fix. Debug version of NSPR always works as it doesn't | |
| 154 // have FD stack. | |
| 155 | |
| 156 int maxPRFdCache = 8192; | |
| 157 PR_SetFDCacheSize(0, maxPRFdCache); | |
| 158 // </WORKAROUND> | |
| 159 } | |
| 160 | |
| 161 | |
| 162 NSAPI_PUBLIC int systhread_newkey() | |
| 163 { | |
| 164 uintn newkey; | |
| 165 | |
| 166 PR_NewThreadPrivateIndex(&newkey, NULL); | |
| 167 return (newkey); | |
| 168 } | |
| 169 | |
| 170 NSAPI_PUBLIC void *systhread_getdata(int key) | |
| 171 { | |
| 172 return PR_GetThreadPrivate(key); | |
| 173 } | |
| 174 | |
| 175 NSAPI_PUBLIC void systhread_setdata(int key, void *data) | |
| 176 { | |
| 177 PR_SetThreadPrivate(key, data); | |
| 178 } | |
| 179 | |
| 180 NSAPI_PUBLIC void systhread_dummy(void) | |
| 181 { | |
| 182 } |
