diff options
Diffstat (limited to 'nsprpub/pr/src/md/unix/aix.c')
| -rw-r--r-- | nsprpub/pr/src/md/unix/aix.c | 301 |
1 files changed, 301 insertions, 0 deletions
diff --git a/nsprpub/pr/src/md/unix/aix.c b/nsprpub/pr/src/md/unix/aix.c new file mode 100644 index 000000000..43f0d58de --- /dev/null +++ b/nsprpub/pr/src/md/unix/aix.c @@ -0,0 +1,301 @@ +/* -*- 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/. */ + +#include "primpl.h" + +#ifdef AIX_HAVE_ATOMIC_OP_H +#include <sys/atomic_op.h> + +PRInt32 _AIX_AtomicSet(PRInt32 *val, PRInt32 newval) +{ + PRIntn oldval; + boolean_t stored; + oldval = fetch_and_add((atomic_p)val, 0); + do + { + stored = compare_and_swap((atomic_p)val, &oldval, newval); + } while (!stored); + return oldval; +} /* _AIX_AtomicSet */ +#endif /* AIX_HAVE_ATOMIC_OP_H */ + +#if defined(AIX_TIMERS) + +#include <sys/time.h> + +static PRUint32 _aix_baseline_epoch; + +static void _MD_AixIntervalInit(void) +{ + timebasestruct_t real_time; + read_real_time(&real_time, TIMEBASE_SZ); + (void)time_base_to_time(&real_time, TIMEBASE_SZ); + _aix_baseline_epoch = real_time.tb_high; +} /* _MD_AixIntervalInit */ + +PRIntervalTime _MD_AixGetInterval(void) +{ + PRIntn rv; + PRUint64 temp; + timebasestruct_t real_time; + read_real_time(&real_time, TIMEBASE_SZ); + (void)time_base_to_time(&real_time, TIMEBASE_SZ); + /* tb_high is in seconds, tb_low in 10(-9)seconds */ + temp = 1000000000ULL * (PRUint64)(real_time.tb_high - _aix_baseline_epoch); + temp += (PRUint64)real_time.tb_low; /* everything's 10(-9) seconds */ + temp >>= 16; /* now it's something way different */ + return (PRIntervalTime)temp; +} /* _MD_AixGetInterval */ + +PRIntervalTime _MD_AixIntervalPerSec(void) +{ + return 1000000000ULL >> 16; /* that's 15258, I think */ +} /* _MD_AixIntervalPerSec */ + +#endif /* defined(AIX_TIMERS) */ + +#if !defined(PTHREADS_USER) + +#if defined(_PR_PTHREADS) + +/* + * AIX 4.3 has sched_yield(). AIX 4.2 has pthread_yield(). + * So we look up the appropriate function pointer at run time. + */ + +#include <dlfcn.h> + +int (*_PT_aix_yield_fcn)() = NULL; +int _pr_aix_send_file_use_disabled = 0; + +void _MD_EarlyInit(void) +{ + void *main_app_handle; + char *evp; + + main_app_handle = dlopen(NULL, RTLD_NOW); + PR_ASSERT(NULL != main_app_handle); + + _PT_aix_yield_fcn = (int(*)())dlsym(main_app_handle, "sched_yield"); + if (!_PT_aix_yield_fcn) { + _PT_aix_yield_fcn = (int(*)())dlsym(main_app_handle,"pthread_yield"); + PR_ASSERT(NULL != _PT_aix_yield_fcn); + } + dlclose(main_app_handle); + + if (evp = getenv("NSPR_AIX_SEND_FILE_USE_DISABLED")) { + if (1 == atoi(evp)) + _pr_aix_send_file_use_disabled = 1; + } + +#if defined(AIX_TIMERS) + _MD_AixIntervalInit(); +#endif +} + +#else /* _PR_PTHREADS */ + +void _MD_EarlyInit(void) +{ +#if defined(AIX_TIMERS) + _MD_AixIntervalInit(); +#endif +} + +#endif /* _PR_PTHREADS */ + +PRWord *_MD_HomeGCRegisters(PRThread *t, int isCurrent, int *np) +{ +#ifndef _PR_PTHREADS + if (isCurrent) { + (void) setjmp(CONTEXT(t)); + } + *np = sizeof(CONTEXT(t)) / sizeof(PRWord); + return (PRWord *) CONTEXT(t); +#else + *np = 0; + return NULL; +#endif +} + +#ifndef _PR_PTHREADS +PR_IMPLEMENT(void) +_MD_SET_PRIORITY(_MDThread *thread, PRUintn newPri) +{ + return; +} + +PR_IMPLEMENT(PRStatus) +_MD_InitializeThread(PRThread *thread) +{ + return PR_SUCCESS; +} + +PR_IMPLEMENT(PRStatus) +_MD_WAIT(PRThread *thread, PRIntervalTime ticks) +{ + PR_ASSERT(!(thread->flags & _PR_GLOBAL_SCOPE)); + _PR_MD_SWITCH_CONTEXT(thread); + return PR_SUCCESS; +} + +PR_IMPLEMENT(PRStatus) +_MD_WAKEUP_WAITER(PRThread *thread) +{ + if (thread) { + PR_ASSERT(!(thread->flags & _PR_GLOBAL_SCOPE)); + } + return PR_SUCCESS; +} + +/* These functions should not be called for AIX */ +PR_IMPLEMENT(void) +_MD_YIELD(void) +{ + PR_NOT_REACHED("_MD_YIELD should not be called for AIX."); +} + +PR_IMPLEMENT(PRStatus) +_MD_CREATE_THREAD( + PRThread *thread, + void (*start) (void *), + PRThreadPriority priority, + PRThreadScope scope, + PRThreadState state, + PRUint32 stackSize) +{ + PR_NOT_REACHED("_MD_CREATE_THREAD should not be called for AIX."); +} +#endif /* _PR_PTHREADS */ +#endif /* PTHREADS_USER */ + +/* + * NSPR 2.0 overrides the system select() and poll() functions. + * On AIX 4.2, we use dlopen("/unix", RTLD_NOW) and dlsym() to get + * at the original system select() and poll() functions. + */ + +#if !defined(AIX_RENAME_SELECT) + +#include <sys/select.h> +#include <sys/poll.h> +#include <dlfcn.h> + +static int (*aix_select_fcn)() = NULL; +static int (*aix_poll_fcn)() = NULL; + +int _MD_SELECT(int width, fd_set *r, fd_set *w, fd_set *e, struct timeval *t) +{ + int rv; + + if (!aix_select_fcn) { + void *aix_handle; + + aix_handle = dlopen("/unix", RTLD_NOW); + if (!aix_handle) { + PR_SetError(PR_UNKNOWN_ERROR, 0); + return -1; + } + aix_select_fcn = (int(*)())dlsym(aix_handle,"select"); + dlclose(aix_handle); + if (!aix_select_fcn) { + PR_SetError(PR_UNKNOWN_ERROR, 0); + return -1; + } + } + rv = (*aix_select_fcn)(width, r, w, e, t); + return rv; +} + +int _MD_POLL(void *listptr, unsigned long nfds, long timeout) +{ + int rv; + + if (!aix_poll_fcn) { + void *aix_handle; + + aix_handle = dlopen("/unix", RTLD_NOW); + if (!aix_handle) { + PR_SetError(PR_UNKNOWN_ERROR, 0); + return -1; + } + aix_poll_fcn = (int(*)())dlsym(aix_handle,"poll"); + dlclose(aix_handle); + if (!aix_poll_fcn) { + PR_SetError(PR_UNKNOWN_ERROR, 0); + return -1; + } + } + rv = (*aix_poll_fcn)(listptr, nfds, timeout); + return rv; +} + +#else + +/* + * In AIX versions prior to 4.2, we use the two-step rename/link trick. + * The binary must contain at least one "poll" symbol for linker's rename + * to work. So we must have this dummy function that references poll(). + */ +#include <sys/poll.h> +void _pr_aix_dummy() +{ + poll(0,0,0); +} + +#endif /* !defined(AIX_RENAME_SELECT) */ + +#ifdef _PR_HAVE_ATOMIC_CAS + +#include "pratom.h" + +#define _PR_AIX_ATOMIC_LOCK -1 + +PR_IMPLEMENT(void) +PR_StackPush(PRStack *stack, PRStackElem *stack_elem) +{ +PRStackElem *addr; +boolean_t locked = TRUE; + + /* Is it safe to cast a pointer to an int? */ + PR_ASSERT(sizeof(int) == sizeof(PRStackElem *)); + do { + while ((addr = stack->prstk_head.prstk_elem_next) == + (PRStackElem *)_PR_AIX_ATOMIC_LOCK) + ; + locked = _check_lock((atomic_p) &stack->prstk_head.prstk_elem_next, + (int) addr, _PR_AIX_ATOMIC_LOCK); + } while (locked == TRUE); + stack_elem->prstk_elem_next = addr; + _clear_lock((atomic_p)&stack->prstk_head.prstk_elem_next, (int)stack_elem); + return; +} + +PR_IMPLEMENT(PRStackElem *) +PR_StackPop(PRStack *stack) +{ +PRStackElem *element; +boolean_t locked = TRUE; + + /* Is it safe to cast a pointer to an int? */ + PR_ASSERT(sizeof(int) == sizeof(PRStackElem *)); + do { + while ((element = stack->prstk_head.prstk_elem_next) == + (PRStackElem *) _PR_AIX_ATOMIC_LOCK) + ; + locked = _check_lock((atomic_p) &stack->prstk_head.prstk_elem_next, + (int)element, _PR_AIX_ATOMIC_LOCK); + } while (locked == TRUE); + + if (element == NULL) { + _clear_lock((atomic_p) &stack->prstk_head.prstk_elem_next, NULL); + } else { + _clear_lock((atomic_p) &stack->prstk_head.prstk_elem_next, + (int) element->prstk_elem_next); + } + return element; +} + +#endif /* _PR_HAVE_ATOMIC_CAS */ |