mirror of
https://github.com/rn10950/RetroZilla.git
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305 lines
12 KiB
C
305 lines
12 KiB
C
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the Netscape Portable Runtime (NSPR).
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998-2000
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nspr_pth_defs_h_
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#define nspr_pth_defs_h_
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/*
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** Appropriate definitions of entry points not used in a pthreads world
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*/
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#define _PR_MD_BLOCK_CLOCK_INTERRUPTS()
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#define _PR_MD_UNBLOCK_CLOCK_INTERRUPTS()
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#define _PR_MD_DISABLE_CLOCK_INTERRUPTS()
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#define _PR_MD_ENABLE_CLOCK_INTERRUPTS()
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/* In good standards fashion, the DCE threads (based on posix-4) are not
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* quite the same as newer posix implementations. These are mostly name
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* changes and small differences, so macros usually do the trick
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*/
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#ifdef _PR_DCETHREADS
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#define _PT_PTHREAD_MUTEXATTR_INIT pthread_mutexattr_create
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#define _PT_PTHREAD_MUTEXATTR_DESTROY pthread_mutexattr_delete
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#define _PT_PTHREAD_MUTEX_INIT(m, a) pthread_mutex_init(&(m), a)
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#define _PT_PTHREAD_MUTEX_IS_LOCKED(m) (0 == pthread_mutex_trylock(&(m)))
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#define _PT_PTHREAD_CONDATTR_INIT pthread_condattr_create
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#define _PT_PTHREAD_COND_INIT(m, a) pthread_cond_init(&(m), a)
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#define _PT_PTHREAD_CONDATTR_DESTROY pthread_condattr_delete
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/* Notes about differences between DCE threads and pthreads 10:
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* 1. pthread_mutex_trylock returns 1 when it locks the mutex
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* 0 when it does not. The latest pthreads has a set of errno-like
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* return values.
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* 2. return values from pthread_cond_timedwait are different.
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*
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*
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*
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*/
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#elif defined(BSDI)
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/*
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* Mutex and condition attributes are not supported. The attr
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* argument to pthread_mutex_init() and pthread_cond_init() must
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* be passed as NULL.
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*
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* The memset calls in _PT_PTHREAD_MUTEX_INIT and _PT_PTHREAD_COND_INIT
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* are to work around BSDI's using a single bit to indicate a mutex
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* or condition variable is initialized. This entire BSDI section
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* will go away when BSDI releases updated threads libraries for
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* BSD/OS 3.1 and 4.0.
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*/
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#define _PT_PTHREAD_MUTEXATTR_INIT(x) 0
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#define _PT_PTHREAD_MUTEXATTR_DESTROY(x) /* */
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#define _PT_PTHREAD_MUTEX_INIT(m, a) (memset(&(m), 0, sizeof(m)), \
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pthread_mutex_init(&(m), NULL))
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#define _PT_PTHREAD_MUTEX_IS_LOCKED(m) (EBUSY == pthread_mutex_trylock(&(m)))
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#define _PT_PTHREAD_CONDATTR_INIT(x) 0
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#define _PT_PTHREAD_CONDATTR_DESTROY(x) /* */
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#define _PT_PTHREAD_COND_INIT(m, a) (memset(&(m), 0, sizeof(m)), \
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pthread_cond_init(&(m), NULL))
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#else
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#define _PT_PTHREAD_MUTEXATTR_INIT pthread_mutexattr_init
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#define _PT_PTHREAD_MUTEXATTR_DESTROY pthread_mutexattr_destroy
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#define _PT_PTHREAD_MUTEX_INIT(m, a) pthread_mutex_init(&(m), &(a))
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#if defined(FREEBSD)
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#define _PT_PTHREAD_MUTEX_IS_LOCKED(m) pt_pthread_mutex_is_locked(&(m))
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#else
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#define _PT_PTHREAD_MUTEX_IS_LOCKED(m) (EBUSY == pthread_mutex_trylock(&(m)))
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#endif
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#if defined(DARWIN)
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#define _PT_PTHREAD_CONDATTR_INIT(x) 0
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#else
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#define _PT_PTHREAD_CONDATTR_INIT pthread_condattr_init
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#endif
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#define _PT_PTHREAD_CONDATTR_DESTROY pthread_condattr_destroy
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#define _PT_PTHREAD_COND_INIT(m, a) pthread_cond_init(&(m), &(a))
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#endif
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/* The pthreads standard does not specify an invalid value for the
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* pthread_t handle. (0 is usually an invalid pthread identifier
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* but there are exceptions, for example, DG/UX.) These macros
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* define a way to set the handle to or compare the handle with an
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* invalid identifier. These macros are not portable and may be
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* more of a problem as we adapt to more pthreads implementations.
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* They are only used in the PRMonitor functions. Do not use them
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* in new code.
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*
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* Unfortunately some of our clients depend on certain properties
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* of our PRMonitor implementation, preventing us from replacing
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* it by a portable implementation.
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* - High-performance servers like the fact that PR_EnterMonitor
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* only calls PR_Lock and PR_ExitMonitor only calls PR_Unlock.
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* (A portable implementation would use a PRLock and a PRCondVar
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* to implement the recursive lock in a monitor and call both
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* PR_Lock and PR_Unlock in PR_EnterMonitor and PR_ExitMonitor.)
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* Unfortunately this forces us to read the monitor owner field
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* without holding a lock.
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* - One way to make it safe to read the monitor owner field
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* without holding a lock is to make that field a PRThread*
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* (one should be able to read a pointer with a single machine
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* instruction). However, PR_GetCurrentThread calls calloc if
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* it is called by a thread that was not created by NSPR. The
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* malloc tracing tools in the Mozilla client use PRMonitor for
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* locking in their malloc, calloc, and free functions. If
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* PR_EnterMonitor calls any of these functions, infinite
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* recursion ensues.
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*/
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#if defined(_PR_DCETHREADS)
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#define _PT_PTHREAD_INVALIDATE_THR_HANDLE(t) \
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memset(&(t), 0, sizeof(pthread_t))
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#define _PT_PTHREAD_THR_HANDLE_IS_INVALID(t) \
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(!memcmp(&(t), &pt_zero_tid, sizeof(pthread_t)))
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#define _PT_PTHREAD_COPY_THR_HANDLE(st, dt) (dt) = (st)
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#elif defined(IRIX) || defined(OSF1) || defined(AIX) || defined(SOLARIS) \
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|| defined(LINUX) || defined(__GNU__) || defined(__GLIBC__) \
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|| defined(HPUX) || defined(FREEBSD) \
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|| defined(NETBSD) || defined(OPENBSD) || defined(BSDI) \
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|| defined(VMS) || defined(NTO) || defined(DARWIN) \
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|| defined(UNIXWARE) || defined(RISCOS) || defined(SYMBIAN)
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#ifdef __GNU__
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/* Hurd pthreads don't have an invalid value for pthread_t. -- rmh */
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#error Using Hurd pthreads
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#endif
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#define _PT_PTHREAD_INVALIDATE_THR_HANDLE(t) (t) = 0
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#define _PT_PTHREAD_THR_HANDLE_IS_INVALID(t) (t) == 0
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#define _PT_PTHREAD_COPY_THR_HANDLE(st, dt) (dt) = (st)
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#else
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#error "pthreads is not supported for this architecture"
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#endif
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#if defined(_PR_DCETHREADS)
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#define _PT_PTHREAD_ATTR_INIT pthread_attr_create
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#define _PT_PTHREAD_ATTR_DESTROY pthread_attr_delete
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#define _PT_PTHREAD_CREATE(t, a, f, r) pthread_create(t, a, f, r)
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#define _PT_PTHREAD_KEY_CREATE pthread_keycreate
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#define _PT_PTHREAD_ATTR_SETSCHEDPOLICY pthread_attr_setsched
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#define _PT_PTHREAD_ATTR_GETSTACKSIZE(a, s) \
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(*(s) = pthread_attr_getstacksize(*(a)), 0)
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#define _PT_PTHREAD_GETSPECIFIC(k, r) \
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pthread_getspecific((k), (pthread_addr_t *) &(r))
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#elif defined(_PR_PTHREADS)
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#define _PT_PTHREAD_ATTR_INIT pthread_attr_init
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#define _PT_PTHREAD_ATTR_DESTROY pthread_attr_destroy
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#define _PT_PTHREAD_CREATE(t, a, f, r) pthread_create(t, &a, f, r)
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#define _PT_PTHREAD_KEY_CREATE pthread_key_create
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#define _PT_PTHREAD_ATTR_SETSCHEDPOLICY pthread_attr_setschedpolicy
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#define _PT_PTHREAD_ATTR_GETSTACKSIZE(a, s) pthread_attr_getstacksize(a, s)
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#define _PT_PTHREAD_GETSPECIFIC(k, r) (r) = pthread_getspecific(k)
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#else
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#error "Cannot determine pthread strategy"
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#endif
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#if defined(_PR_DCETHREADS)
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#define _PT_PTHREAD_EXPLICIT_SCHED _PT_PTHREAD_DEFAULT_SCHED
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#endif
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/*
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* pthread_mutex_trylock returns different values in DCE threads and
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* pthreads.
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*/
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#if defined(_PR_DCETHREADS)
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#define PT_TRYLOCK_SUCCESS 1
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#define PT_TRYLOCK_BUSY 0
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#else
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#define PT_TRYLOCK_SUCCESS 0
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#define PT_TRYLOCK_BUSY EBUSY
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#endif
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/*
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* These platforms don't have sigtimedwait()
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*/
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#if (defined(AIX) && !defined(AIX4_3_PLUS)) \
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|| defined(LINUX) || defined(__GNU__)|| defined(__GLIBC__) \
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|| defined(FREEBSD) || defined(NETBSD) || defined(OPENBSD) \
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|| defined(BSDI) || defined(VMS) || defined(UNIXWARE) \
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|| defined(DARWIN) || defined(SYMBIAN)
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#define PT_NO_SIGTIMEDWAIT
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#endif
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#if defined(OSF1) || defined(VMS)
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#define PT_PRIO_MIN PRI_OTHER_MIN
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#define PT_PRIO_MAX PRI_OTHER_MAX
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#elif defined(IRIX)
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#include <sys/sched.h>
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#define PT_PRIO_MIN PX_PRIO_MIN
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#define PT_PRIO_MAX PX_PRIO_MAX
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#elif defined(AIX)
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#include <sys/priv.h>
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#include <sys/sched.h>
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#ifndef PTHREAD_CREATE_JOINABLE
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#define PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED
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#endif
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#define PT_PRIO_MIN DEFAULT_PRIO
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#define PT_PRIO_MAX DEFAULT_PRIO
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#elif defined(HPUX)
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#if defined(_PR_DCETHREADS)
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#define PT_PRIO_MIN PRI_OTHER_MIN
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#define PT_PRIO_MAX PRI_OTHER_MAX
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#else /* defined(_PR_DCETHREADS) */
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#include <sys/sched.h>
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#define PT_PRIO_MIN sched_get_priority_min(SCHED_OTHER)
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#define PT_PRIO_MAX sched_get_priority_max(SCHED_OTHER)
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#endif /* defined(_PR_DCETHREADS) */
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#elif defined(LINUX) || defined(__GNU__) || defined(__GLIBC__) \
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|| defined(FREEBSD) || defined(SYMBIAN)
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#define PT_PRIO_MIN sched_get_priority_min(SCHED_OTHER)
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#define PT_PRIO_MAX sched_get_priority_max(SCHED_OTHER)
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#elif defined(NTO)
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/*
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* Neutrino has functions that return the priority range but
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* they return invalid numbers, so I just hard coded these here
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* for now. Jerry.Kirk@Nexarecorp.com
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*/
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#define PT_PRIO_MIN 0
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#define PT_PRIO_MAX 30
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#elif defined(SOLARIS)
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/*
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* Solaris doesn't seem to have macros for the min/max priorities.
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* The range of 0-127 is mentioned in the pthread_setschedparam(3T)
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* man pages, and pthread_setschedparam indeed allows 0-127. However,
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* pthread_attr_setschedparam does not allow 0; it allows 1-127.
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*/
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#define PT_PRIO_MIN 1
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#define PT_PRIO_MAX 127
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#elif defined(OPENBSD)
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#define PT_PRIO_MIN 0
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#define PT_PRIO_MAX 31
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#elif defined(NETBSD) \
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|| defined(BSDI) || defined(DARWIN) || defined(UNIXWARE) \
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|| defined(RISCOS) /* XXX */
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#define PT_PRIO_MIN 0
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#define PT_PRIO_MAX 126
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#else
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#error "pthreads is not supported for this architecture"
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#endif
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/*
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* The _PT_PTHREAD_YIELD function is called from a signal handler.
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* Needed for garbage collection -- Look at PR_Suspend/PR_Resume
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* implementation.
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*/
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#if defined(_PR_DCETHREADS)
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#define _PT_PTHREAD_YIELD() pthread_yield()
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#elif defined(OSF1) || defined(VMS)
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/*
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* sched_yield can't be called from a signal handler. Must use
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* the _np version.
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*/
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#define _PT_PTHREAD_YIELD() pthread_yield_np()
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#elif defined(AIX)
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extern int (*_PT_aix_yield_fcn)();
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#define _PT_PTHREAD_YIELD() (*_PT_aix_yield_fcn)()
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#elif defined(IRIX)
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#include <time.h>
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#define _PT_PTHREAD_YIELD() \
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PR_BEGIN_MACRO \
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struct timespec onemillisec = {0}; \
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onemillisec.tv_nsec = 1000000L; \
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nanosleep(&onemillisec,NULL); \
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PR_END_MACRO
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#elif defined(HPUX) || defined(SOLARIS) \
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|| defined(LINUX) || defined(__GNU__) || defined(__GLIBC__) \
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|| defined(FREEBSD) || defined(NETBSD) || defined(OPENBSD) \
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|| defined(BSDI) || defined(NTO) || defined(DARWIN) \
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|| defined(UNIXWARE) || defined(RISCOS) || defined(SYMBIAN)
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#define _PT_PTHREAD_YIELD() sched_yield()
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#else
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#error "Need to define _PT_PTHREAD_YIELD for this platform"
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#endif
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#endif /* nspr_pth_defs_h_ */
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