173 строки
4.7 KiB
C
173 строки
4.7 KiB
C
/*
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* Copyright (c) 1994 by Xerox Corporation. All rights reserved.
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*
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* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
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* OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
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*
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* Permission is hereby granted to use or copy this program
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* for any purpose, provided the above notices are retained on all copies.
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* Permission to modify the code and to distribute modified code is granted,
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* provided the above notices are retained, and a notice that the code was
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* modified is included with the above copyright notice.
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*/
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/*
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* Support code for Solaris threads. Provides functionality we wish Sun
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* had provided. Relies on some information we probably shouldn't rely on.
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* Modified Peter C. for Solaris Posix Threads.
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*/
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/* Boehm, September 14, 1994 4:44 pm PDT */
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/* $Id: solaris_pthreads.c,v 1.1 1999-09-30 02:23:10 beard%netscape.com Exp $ */
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# if defined(_SOLARIS_PTHREADS)
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# include "gc_priv.h"
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# include <pthread.h>
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# include <thread.h>
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# include <signal.h>
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# include <fcntl.h>
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# include <sys/types.h>
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# include <sys/mman.h>
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# include <sys/time.h>
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# include <sys/resource.h>
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# include <sys/stat.h>
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# include <sys/syscall.h>
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# include <sys/procfs.h>
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# include <sys/lwp.h>
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# include <sys/reg.h>
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# define _CLASSIC_XOPEN_TYPES
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# include <unistd.h>
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# include <errno.h>
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# include "solaris_threads.h"
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# include <stdio.h>
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#undef pthread_join
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#undef pthread_create
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pthread_cond_t GC_prom_join_cv; /* Broadcast when any thread terminates */
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pthread_cond_t GC_create_cv; /* Signalled when a new undetached */
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/* thread starts. */
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extern GC_bool GC_multithreaded;
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/* We use the allocation lock to protect thread-related data structures. */
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/* We stop the world using /proc primitives. This makes some */
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/* minimal assumptions about the threads implementation. */
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/* We don't play by the rules, since the rules make this */
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/* impossible (as of Solaris 2.3). Also note that as of */
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/* Solaris 2.3 the various thread and lwp suspension */
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/* primitives failed to stop threads by the time the request */
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/* is completed. */
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int GC_pthread_join(pthread_t wait_for, void **status)
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{
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return GC_thr_join((thread_t)wait_for, NULL, status);
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}
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int
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GC_pthread_create(pthread_t *new_thread,
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const pthread_attr_t *attr_in,
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void * (*thread_execp)(void *), void *arg)
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{
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int result;
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GC_thread t;
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pthread_t my_new_thread;
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pthread_attr_t attr;
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word my_flags = 0;
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int flag;
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void * stack;
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size_t stack_size;
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int n;
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struct sched_param schedparam;
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(void)pthread_attr_getstacksize(attr_in, &stack_size);
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(void)pthread_attr_getstackaddr(attr_in, &stack);
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(void)pthread_attr_init(&attr);
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LOCK();
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if (!GC_thr_initialized) {
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GC_thr_init();
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}
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GC_multithreaded++;
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if (stack == 0) {
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if (stack_size == 0)
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stack_size = GC_min_stack_sz;
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else
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stack_size += thr_min_stack();
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stack = (void *)GC_stack_alloc(&stack_size);
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if (stack == 0) {
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GC_multithreaded--;
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UNLOCK();
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errno = ENOMEM;
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return -1;
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}
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} else {
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my_flags |= CLIENT_OWNS_STACK;
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}
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(void)pthread_attr_setstacksize(&attr, stack_size);
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(void)pthread_attr_setstackaddr(&attr, stack);
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(void)pthread_attr_getscope(attr_in, &n);
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(void)pthread_attr_setscope(&attr, n);
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(void)pthread_attr_getschedparam(attr_in, &schedparam);
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(void)pthread_attr_setschedparam(&attr, &schedparam);
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(void)pthread_attr_getschedpolicy(attr_in, &n);
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(void)pthread_attr_setschedpolicy(&attr, n);
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(void)pthread_attr_getinheritsched(attr_in, &n);
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(void)pthread_attr_setinheritsched(&attr, n);
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(void)pthread_attr_getdetachstate(attr_in, &flag);
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if (flag == PTHREAD_CREATE_DETACHED) {
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my_flags |= DETACHED;
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}
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(void)pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
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/*
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* thr_create can call malloc(), which if redirected will
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* attempt to acquire the allocation lock.
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* Unlock here to prevent deadlock.
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*/
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#if 0
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#ifdef I386
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UNLOCK();
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#endif
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#endif
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result =
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pthread_create(&my_new_thread, &attr, thread_execp, arg);
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#if 0
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#ifdef I386
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LOCK();
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#endif
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#endif
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if (result == 0) {
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t = GC_new_thread(my_new_thread);
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t -> flags = my_flags;
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if (!(my_flags & DETACHED)) cond_init(&(t->join_cv), USYNC_THREAD, 0);
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t -> stack = stack;
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t -> stack_size = stack_size;
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if (new_thread != 0) *new_thread = my_new_thread;
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pthread_cond_signal(&GC_create_cv);
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} else {
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if (!(my_flags & CLIENT_OWNS_STACK)) {
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GC_stack_free(stack, stack_size);
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}
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GC_multithreaded--;
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}
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UNLOCK();
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pthread_attr_destroy(&attr);
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return(result);
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}
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# else
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#ifndef LINT
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int GC_no_sunOS_pthreads;
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#endif
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# endif /* SOLARIS_THREADS */
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