| 1 | /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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| 2 | /* ***** BEGIN LICENSE BLOCK *****
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| 3 | * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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| 4 | *
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| 5 | * The contents of this file are subject to the Mozilla Public License Version
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| 6 | * 1.1 (the "License"); you may not use this file except in compliance with
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| 7 | * the License. You may obtain a copy of the License at
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| 8 | * http://www.mozilla.org/MPL/
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| 9 | *
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| 10 | * Software distributed under the License is distributed on an "AS IS" basis,
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| 11 | * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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| 12 | * for the specific language governing rights and limitations under the
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| 13 | * License.
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| 14 | *
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| 15 | * The Original Code is the Netscape Portable Runtime (NSPR).
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| 16 | *
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| 17 | * The Initial Developer of the Original Code is
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| 18 | * Netscape Communications Corporation.
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| 19 | * Portions created by the Initial Developer are Copyright (C) 1998-2000
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| 20 | * the Initial Developer. All Rights Reserved.
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| 21 | *
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| 22 | * Contributor(s):
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| 23 | *
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| 24 | * Alternatively, the contents of this file may be used under the terms of
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| 25 | * either the GNU General Public License Version 2 or later (the "GPL"), or
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| 26 | * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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| 27 | * in which case the provisions of the GPL or the LGPL are applicable instead
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| 28 | * of those above. If you wish to allow use of your version of this file only
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| 29 | * under the terms of either the GPL or the LGPL, and not to allow others to
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| 30 | * use your version of this file under the terms of the MPL, indicate your
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| 31 | * decision by deleting the provisions above and replace them with the notice
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| 32 | * and other provisions required by the GPL or the LGPL. If you do not delete
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| 33 | * the provisions above, a recipient may use your version of this file under
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| 34 | * the terms of any one of the MPL, the GPL or the LGPL.
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| 35 | *
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| 36 | * ***** END LICENSE BLOCK ***** */
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| 37 |
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| 38 | #ifndef nspr_pth_defs_h_
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| 39 | #define nspr_pth_defs_h_
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| 40 |
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| 41 | /*
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| 42 | ** Appropriate definitions of entry points not used in a pthreads world
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| 43 | */
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| 44 | #define _PR_MD_BLOCK_CLOCK_INTERRUPTS()
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| 45 | #define _PR_MD_UNBLOCK_CLOCK_INTERRUPTS()
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| 46 | #define _PR_MD_DISABLE_CLOCK_INTERRUPTS()
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| 47 | #define _PR_MD_ENABLE_CLOCK_INTERRUPTS()
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| 48 |
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| 49 | #define _PT_PTHREAD_MUTEXATTR_INIT pthread_mutexattr_init
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| 50 | #define _PT_PTHREAD_MUTEXATTR_DESTROY pthread_mutexattr_destroy
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| 51 | #define _PT_PTHREAD_MUTEX_INIT(m, a) pthread_mutex_init(&(m), &(a))
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| 52 | #define _PT_PTHREAD_MUTEX_IS_LOCKED(m) (EBUSY == pthread_mutex_trylock(&(m)))
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| 53 | #if defined(DARWIN)
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| 54 | #define _PT_PTHREAD_CONDATTR_INIT(x) 0
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| 55 | #else
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| 56 | #define _PT_PTHREAD_CONDATTR_INIT pthread_condattr_init
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| 57 | #endif
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| 58 | #define _PT_PTHREAD_CONDATTR_DESTROY pthread_condattr_destroy
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| 59 | #define _PT_PTHREAD_COND_INIT(m, a) pthread_cond_init(&(m), &(a))
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| 60 |
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| 61 | /* The pthreads standard does not specify an invalid value for the
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| 62 | * pthread_t handle. (0 is usually an invalid pthread identifier
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| 63 | * but there are exceptions, for example, DG/UX.) These macros
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| 64 | * define a way to set the handle to or compare the handle with an
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| 65 | * invalid identifier. These macros are not portable and may be
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| 66 | * more of a problem as we adapt to more pthreads implementations.
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| 67 | * They are only used in the PRMonitor functions. Do not use them
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| 68 | * in new code.
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| 69 | *
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| 70 | * Unfortunately some of our clients depend on certain properties
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| 71 | * of our PRMonitor implementation, preventing us from replacing
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| 72 | * it by a portable implementation.
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| 73 | * - High-performance servers like the fact that PR_EnterMonitor
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| 74 | * only calls PR_Lock and PR_ExitMonitor only calls PR_Unlock.
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| 75 | * (A portable implementation would use a PRLock and a PRCondVar
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| 76 | * to implement the recursive lock in a monitor and call both
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| 77 | * PR_Lock and PR_Unlock in PR_EnterMonitor and PR_ExitMonitor.)
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| 78 | * Unfortunately this forces us to read the monitor owner field
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| 79 | * without holding a lock.
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| 80 | * - One way to make it safe to read the monitor owner field
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| 81 | * without holding a lock is to make that field a PRThread*
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| 82 | * (one should be able to read a pointer with a single machine
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| 83 | * instruction). However, PR_GetCurrentThread calls calloc if
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| 84 | * it is called by a thread that was not created by NSPR. The
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| 85 | * malloc tracing tools in the Mozilla client use PRMonitor for
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| 86 | * locking in their malloc, calloc, and free functions. If
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| 87 | * PR_EnterMonitor calls any of these functions, infinite
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| 88 | * recursion ensues.
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| 89 | */
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| 90 | #if defined(IRIX) || defined(OSF1) || defined(AIX) || defined(SOLARIS) \
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| 91 | || defined(HPUX) || defined(LINUX) || defined(FREEBSD) \
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| 92 | || defined(NETBSD) || defined(OPENBSD) || defined(BSDI) \
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| 93 | || defined(VMS) || defined(NTO) || defined(DARWIN) \
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| 94 | || defined(UNIXWARE)
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| 95 | #define _PT_PTHREAD_INVALIDATE_THR_HANDLE(t) (t) = 0
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| 96 | #define _PT_PTHREAD_THR_HANDLE_IS_INVALID(t) (t) == 0
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| 97 | #define _PT_PTHREAD_COPY_THR_HANDLE(st, dt) (dt) = (st)
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| 98 | #else
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| 99 | #error "pthreads is not supported for this architecture"
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| 100 | #endif
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| 101 |
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| 102 | #if defined(_PR_PTHREADS)
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| 103 | #define _PT_PTHREAD_ATTR_INIT pthread_attr_init
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| 104 | #define _PT_PTHREAD_ATTR_DESTROY pthread_attr_destroy
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| 105 | #define _PT_PTHREAD_CREATE(t, a, f, r) pthread_create(t, &a, f, r)
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| 106 | #define _PT_PTHREAD_KEY_CREATE pthread_key_create
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| 107 | #define _PT_PTHREAD_ATTR_SETSCHEDPOLICY pthread_attr_setschedpolicy
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| 108 | #define _PT_PTHREAD_ATTR_GETSTACKSIZE(a, s) pthread_attr_getstacksize(a, s)
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| 109 | #define _PT_PTHREAD_GETSPECIFIC(k, r) (r) = pthread_getspecific(k)
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| 110 | #else
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| 111 | #error "Cannot determine pthread strategy"
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| 112 | #endif
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| 113 |
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| 114 | #define PT_TRYLOCK_SUCCESS 0
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| 115 | #define PT_TRYLOCK_BUSY EBUSY
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| 116 |
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| 117 | /*
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| 118 | * These platforms don't have sigtimedwait()
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| 119 | */
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| 120 | #if (defined(AIX) && !defined(AIX4_3_PLUS)) || defined(LINUX) \
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| 121 | || defined(FREEBSD) || defined(NETBSD) || defined(OPENBSD) \
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| 122 | || defined(BSDI) || defined(VMS) || defined(UNIXWARE) \
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| 123 | || defined(DARWIN)
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| 124 | #define PT_NO_SIGTIMEDWAIT
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| 125 | #endif
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| 126 |
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| 127 | /*
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| 128 | * These platforms don't have pthread_kill()
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| 129 | */
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| 130 | #if defined(DARWIN) && !defined(_DARWIN_FEATURE_UNIX_CONFORMANCE)
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| 131 | #define pthread_kill(thread, sig) ENOSYS
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| 132 | #endif
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| 133 |
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| 134 | #if defined(LINUX) || defined(FREEBSD)
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| 135 | #define PT_PRIO_MIN sched_get_priority_min(SCHED_OTHER)
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| 136 | #define PT_PRIO_MAX sched_get_priority_max(SCHED_OTHER)
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| 137 | #elif defined(SOLARIS)
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| 138 | /*
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| 139 | * Solaris doesn't seem to have macros for the min/max priorities.
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| 140 | * The range of 0-127 is mentioned in the pthread_setschedparam(3T)
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| 141 | * man pages, and pthread_setschedparam indeed allows 0-127. However,
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| 142 | * pthread_attr_setschedparam does not allow 0; it allows 1-127.
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| 143 | */
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| 144 | #define PT_PRIO_MIN 1
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| 145 | #define PT_PRIO_MAX 127
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| 146 | #elif defined(OPENBSD)
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| 147 | #define PT_PRIO_MIN 0
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| 148 | #define PT_PRIO_MAX 31
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| 149 | #elif defined(NETBSD) \
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| 150 | || defined(BSDI) || defined(DARWIN) || defined(UNIXWARE) /* XXX */
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| 151 | #define PT_PRIO_MIN 0
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| 152 | #define PT_PRIO_MAX 126
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| 153 | #else
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| 154 | #error "pthreads is not supported for this architecture"
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| 155 | #endif
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| 156 |
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| 157 | /*
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| 158 | * The _PT_PTHREAD_YIELD function is called from a signal handler.
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| 159 | * Needed for garbage collection -- Look at PR_Suspend/PR_Resume
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| 160 | * implementation.
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| 161 | */
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| 162 | #if defined(HPUX) || defined(LINUX) || defined(SOLARIS) \
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| 163 | || defined(FREEBSD) || defined(NETBSD) || defined(OPENBSD) \
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| 164 | || defined(BSDI) || defined(NTO) || defined(DARWIN) \
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| 165 | || defined(UNIXWARE)
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| 166 | #define _PT_PTHREAD_YIELD() sched_yield()
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| 167 | #else
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| 168 | #error "Need to define _PT_PTHREAD_YIELD for this platform"
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| 169 | #endif
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| 170 |
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| 171 | #endif /* nspr_pth_defs_h_ */
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