1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* This Source Code Form is subject to the terms of the Mozilla Public 3 * License, v. 2.0. If a copy of the MPL was not distributed with this 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 5 6 #ifndef nspr_pth_defs_h_ 7 #define nspr_pth_defs_h_ 8 9 /* 10 ** Appropriate definitions of entry points not used in a pthreads world 11 */ 12 #define _PR_MD_BLOCK_CLOCK_INTERRUPTS() 13 #define _PR_MD_UNBLOCK_CLOCK_INTERRUPTS() 14 #define _PR_MD_DISABLE_CLOCK_INTERRUPTS() 15 #define _PR_MD_ENABLE_CLOCK_INTERRUPTS() 16 17 #if defined(BSDI) 18 /* 19 * Mutex and condition attributes are not supported. The attr 20 * argument to pthread_mutex_init() and pthread_cond_init() must 21 * be passed as NULL. 22 * 23 * The memset calls in _PT_PTHREAD_MUTEX_INIT and _PT_PTHREAD_COND_INIT 24 * are to work around BSDI's using a single bit to indicate a mutex 25 * or condition variable is initialized. This entire BSDI section 26 * will go away when BSDI releases updated threads libraries for 27 * BSD/OS 3.1 and 4.0. 28 */ 29 #define _PT_PTHREAD_MUTEXATTR_INIT(x) 0 30 #define _PT_PTHREAD_MUTEXATTR_DESTROY(x) /* */ 31 #define _PT_PTHREAD_MUTEX_INIT(m, a) (memset(&(m), 0, sizeof(m)), \ 32 pthread_mutex_init(&(m), NULL)) 33 #define _PT_PTHREAD_MUTEX_IS_LOCKED(m) (EBUSY == pthread_mutex_trylock(&(m))) 34 #define _PT_PTHREAD_CONDATTR_INIT(x) 0 35 #define _PT_PTHREAD_CONDATTR_DESTROY(x) /* */ 36 #define _PT_PTHREAD_COND_INIT(m, a) (memset(&(m), 0, sizeof(m)), \ 37 pthread_cond_init(&(m), NULL)) 38 #else 39 #define _PT_PTHREAD_MUTEXATTR_INIT pthread_mutexattr_init 40 #define _PT_PTHREAD_MUTEXATTR_DESTROY pthread_mutexattr_destroy 41 #define _PT_PTHREAD_MUTEX_INIT(m, a) pthread_mutex_init(&(m), &(a)) 42 #if defined(FREEBSD) 43 #define _PT_PTHREAD_MUTEX_IS_LOCKED(m) pt_pthread_mutex_is_locked(&(m)) 44 #else 45 #define _PT_PTHREAD_MUTEX_IS_LOCKED(m) (EBUSY == pthread_mutex_trylock(&(m))) 46 #endif 47 #if defined(ANDROID) 48 /* Conditional attribute init and destroy aren't implemented in bionic. */ 49 #define _PT_PTHREAD_CONDATTR_INIT(x) 0 50 #define _PT_PTHREAD_CONDATTR_DESTROY(x) /* */ 51 #else 52 #define _PT_PTHREAD_CONDATTR_INIT pthread_condattr_init 53 #define _PT_PTHREAD_CONDATTR_DESTROY pthread_condattr_destroy 54 #endif 55 #define _PT_PTHREAD_COND_INIT(m, a) pthread_cond_init(&(m), &(a)) 56 #endif 57 58 /* The pthreads standard does not specify an invalid value for the 59 * pthread_t handle. (0 is usually an invalid pthread identifier 60 * but there are exceptions, for example, DG/UX.) These macros 61 * define a way to set the handle to or compare the handle with an 62 * invalid identifier. These macros are not portable and may be 63 * more of a problem as we adapt to more pthreads implementations. 64 * They are only used in the PRMonitor functions. Do not use them 65 * in new code. 66 * 67 * Unfortunately some of our clients depend on certain properties 68 * of our PRMonitor implementation, preventing us from replacing 69 * it by a portable implementation. 70 * - High-performance servers like the fact that PR_EnterMonitor 71 * only calls PR_Lock and PR_ExitMonitor only calls PR_Unlock. 72 * (A portable implementation would use a PRLock and a PRCondVar 73 * to implement the recursive lock in a monitor and call both 74 * PR_Lock and PR_Unlock in PR_EnterMonitor and PR_ExitMonitor.) 75 * Unfortunately this forces us to read the monitor owner field 76 * without holding a lock. 77 * - One way to make it safe to read the monitor owner field 78 * without holding a lock is to make that field a PRThread* 79 * (one should be able to read a pointer with a single machine 80 * instruction). However, PR_GetCurrentThread calls calloc if 81 * it is called by a thread that was not created by NSPR. The 82 * malloc tracing tools in the Mozilla client use PRMonitor for 83 * locking in their malloc, calloc, and free functions. If 84 * PR_EnterMonitor calls any of these functions, infinite 85 * recursion ensues. 86 */ 87 #if defined(AIX) || defined(SOLARIS) \ 88 || defined(LINUX) || defined(__GNU__) || defined(__GLIBC__) \ 89 || defined(HPUX) || defined(FREEBSD) \ 90 || defined(NETBSD) || defined(OPENBSD) || defined(BSDI) \ 91 || defined(NTO) || defined(DARWIN) \ 92 || defined(UNIXWARE) || defined(RISCOS) 93 #define _PT_PTHREAD_INVALIDATE_THR_HANDLE(t) (t) = 0 94 #define _PT_PTHREAD_THR_HANDLE_IS_INVALID(t) (t) == 0 95 #define _PT_PTHREAD_COPY_THR_HANDLE(st, dt) (dt) = (st) 96 #else 97 #error "pthreads is not supported for this architecture" 98 #endif 99 100 #if defined(_PR_PTHREADS) 101 #define _PT_PTHREAD_ATTR_INIT pthread_attr_init 102 #define _PT_PTHREAD_ATTR_DESTROY pthread_attr_destroy 103 #define _PT_PTHREAD_CREATE(t, a, f, r) pthread_create(t, &a, f, r) 104 #define _PT_PTHREAD_KEY_CREATE pthread_key_create 105 #define _PT_PTHREAD_ATTR_SETSCHEDPOLICY pthread_attr_setschedpolicy 106 #define _PT_PTHREAD_ATTR_GETSTACKSIZE(a, s) pthread_attr_getstacksize(a, s) 107 #define _PT_PTHREAD_GETSPECIFIC(k, r) (r) = pthread_getspecific(k) 108 #else 109 #error "Cannot determine pthread strategy" 110 #endif 111 112 /* 113 * These platforms don't have sigtimedwait() 114 */ 115 #if (defined(AIX) && !defined(AIX4_3_PLUS)) \ 116 || defined(LINUX) || defined(__GNU__)|| defined(__GLIBC__) \ 117 || defined(FREEBSD) || defined(NETBSD) || defined(OPENBSD) \ 118 || defined(BSDI) || defined(UNIXWARE) \ 119 || defined(DARWIN) 120 #define PT_NO_SIGTIMEDWAIT 121 #endif 122 123 #if defined(AIX) 124 #include <sys/priv.h> 125 #include <sys/sched.h> 126 #ifndef PTHREAD_CREATE_JOINABLE 127 #define PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED 128 #endif 129 #define PT_PRIO_MIN DEFAULT_PRIO 130 #define PT_PRIO_MAX DEFAULT_PRIO 131 #elif defined(HPUX) 132 #include <sys/sched.h> 133 #define PT_PRIO_MIN sched_get_priority_min(SCHED_OTHER) 134 #define PT_PRIO_MAX sched_get_priority_max(SCHED_OTHER) 135 #elif defined(LINUX) || defined(__GNU__) || defined(__GLIBC__) \ 136 || defined(FREEBSD) 137 #define PT_PRIO_MIN sched_get_priority_min(SCHED_OTHER) 138 #define PT_PRIO_MAX sched_get_priority_max(SCHED_OTHER) 139 #elif defined(NTO) 140 /* 141 * Neutrino has functions that return the priority range but 142 * they return invalid numbers, so I just hard coded these here 143 * for now. Jerry.Kirk@Nexarecorp.com 144 */ 145 #define PT_PRIO_MIN 0 146 #define PT_PRIO_MAX 30 147 #elif defined(SOLARIS) 148 /* 149 * Solaris doesn't seem to have macros for the min/max priorities. 150 * The range of 0-127 is mentioned in the pthread_setschedparam(3T) 151 * man pages, and pthread_setschedparam indeed allows 0-127. However, 152 * pthread_attr_setschedparam does not allow 0; it allows 1-127. 153 */ 154 #define PT_PRIO_MIN 1 155 #define PT_PRIO_MAX 127 156 #elif defined(OPENBSD) 157 #define PT_PRIO_MIN 0 158 #define PT_PRIO_MAX 31 159 #elif defined(NETBSD) \ 160 || defined(BSDI) || defined(DARWIN) || defined(UNIXWARE) \ 161 || defined(RISCOS) /* XXX */ 162 #define PT_PRIO_MIN 0 163 #define PT_PRIO_MAX 126 164 #else 165 #error "pthreads is not supported for this architecture" 166 #endif 167 168 /* 169 * The _PT_PTHREAD_YIELD function is called from a signal handler. 170 * Needed for garbage collection -- Look at PR_Suspend/PR_Resume 171 * implementation. 172 */ 173 #if defined(AIX) 174 extern int (*_PT_aix_yield_fcn)(); 175 #define _PT_PTHREAD_YIELD() (*_PT_aix_yield_fcn)() 176 #elif defined(HPUX) || defined(SOLARIS) \ 177 || defined(LINUX) || defined(__GNU__) || defined(__GLIBC__) \ 178 || defined(FREEBSD) || defined(NETBSD) || defined(OPENBSD) \ 179 || defined(BSDI) || defined(NTO) || defined(DARWIN) \ 180 || defined(UNIXWARE) || defined(RISCOS) 181 #define _PT_PTHREAD_YIELD() sched_yield() 182 #else 183 #error "Need to define _PT_PTHREAD_YIELD for this platform" 184 #endif 185 186 #endif /* nspr_pth_defs_h_ */ 187