/* 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() #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)) /* 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(AIX) || defined(SOLARIS) \ || defined(LINUX) || defined(__GNU__) || defined(__GLIBC__) \ || defined(FREEBSD) || defined(NETBSD) || defined(OPENBSD) \ || defined(NTO) || defined(DARWIN) \ || defined(RISCOS) #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_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 /* * 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(DARWIN) #define PT_NO_SIGTIMEDWAIT #endif #if defined(AIX) #include #include #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(LINUX) || defined(__GNU__) || defined(__GLIBC__) \ || defined(FREEBSD) #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(DARWIN) \ || 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(AIX) extern int (*_PT_aix_yield_fcn)(); #define _PT_PTHREAD_YIELD() (*_PT_aix_yield_fcn)() #elif defined(SOLARIS) \ || defined(LINUX) || defined(__GNU__) || defined(__GLIBC__) \ || defined(FREEBSD) || defined(NETBSD) || defined(OPENBSD) \ || defined(NTO) || defined(DARWIN) \ || defined(RISCOS) #define _PT_PTHREAD_YIELD() sched_yield() #else #error "Need to define _PT_PTHREAD_YIELD for this platform" #endif #endif /* nspr_pth_defs_h_ */