Delete bundled copy of NSS and replace with README.

nspr/pr/include/md/_pth.h

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