mirror of
https://github.com/python/cpython.git
synced 2024-11-28 16:45:42 +01:00
6d023c98b0
bltinmodule.c: fixed coerce() nightmare in ternary pow(). modsupport.c (initmodule2): pass METH_FREENAME flag to newmethodobject(). pythonrun.c: move flushline() into and around print_error().
440 lines
11 KiB
C
440 lines
11 KiB
C
/***********************************************************
|
|
Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
|
|
The Netherlands.
|
|
|
|
All Rights Reserved
|
|
|
|
Permission to use, copy, modify, and distribute this software and its
|
|
documentation for any purpose and without fee is hereby granted,
|
|
provided that the above copyright notice appear in all copies and that
|
|
both that copyright notice and this permission notice appear in
|
|
supporting documentation, and that the names of Stichting Mathematisch
|
|
Centrum or CWI not be used in advertising or publicity pertaining to
|
|
distribution of the software without specific, written prior permission.
|
|
|
|
STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
|
|
THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
|
|
FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
|
|
FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
|
|
OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
|
|
******************************************************************/
|
|
|
|
#ifdef WITH_SGI_DL
|
|
#define USE_DL
|
|
#endif
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <signal.h>
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
#include <sys/prctl.h>
|
|
#include <ulocks.h>
|
|
#include <errno.h>
|
|
|
|
#define HDR_SIZE 2680 /* sizeof(ushdr_t) */
|
|
#define MAXPROC 100 /* max # of threads that can be started */
|
|
|
|
static usptr_t *shared_arena;
|
|
static ulock_t count_lock; /* protection for some variables */
|
|
static ulock_t wait_lock; /* lock used to wait for other threads */
|
|
static int waiting_for_threads; /* protected by count_lock */
|
|
static int nthreads; /* protected by count_lock */
|
|
static int exit_status;
|
|
#ifndef NO_EXIT_PROG
|
|
static int do_exit; /* indicates that the program is to exit */
|
|
#endif
|
|
static int exiting; /* we're already exiting (for maybe_exit) */
|
|
static pid_t my_pid; /* PID of main thread */
|
|
static struct pidlist {
|
|
pid_t parent;
|
|
pid_t child;
|
|
} pidlist[MAXPROC]; /* PIDs of other threads; protected by count_lock */
|
|
static int maxpidindex; /* # of PIDs in pidlist */
|
|
|
|
#ifndef NO_EXIT_PROG
|
|
/*
|
|
* This routine is called as a signal handler when another thread
|
|
* exits. When that happens, we must see whether we have to exit as
|
|
* well (because of an exit_prog()) or whether we should continue on.
|
|
*/
|
|
static void exit_sig _P0()
|
|
{
|
|
d2printf(("exit_sig called\n"));
|
|
if (exiting && getpid() == my_pid) {
|
|
d2printf(("already exiting\n"));
|
|
return;
|
|
}
|
|
if (do_exit) {
|
|
d2printf(("exiting in exit_sig\n"));
|
|
#ifdef DEBUG
|
|
if ((thread_debug & 8) == 0)
|
|
thread_debug &= ~1; /* don't produce debug messages */
|
|
#endif
|
|
exit_thread();
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This routine is called when a process calls exit(). If that wasn't
|
|
* done from the library, we do as if an exit_prog() was intended.
|
|
*/
|
|
static void maybe_exit _P0()
|
|
{
|
|
dprintf(("maybe_exit called\n"));
|
|
if (exiting) {
|
|
dprintf(("already exiting\n"));
|
|
return;
|
|
}
|
|
exit_prog(0);
|
|
}
|
|
#endif /* NO_EXIT_PROG */
|
|
|
|
/*
|
|
* Initialization.
|
|
*/
|
|
static void _init_thread _P0()
|
|
{
|
|
#ifndef NO_EXIT_PROG
|
|
struct sigaction s;
|
|
#endif /* NO_EXIT_PROG */
|
|
#ifdef USE_DL
|
|
long addr, size;
|
|
#endif /* USE_DL */
|
|
|
|
|
|
#ifdef USE_DL
|
|
if ((size = usconfig(CONF_INITSIZE, 64*1024)) < 0)
|
|
perror("usconfig - CONF_INITSIZE (check)");
|
|
if (usconfig(CONF_INITSIZE, size) < 0)
|
|
perror("usconfig - CONF_INITSIZE (reset)");
|
|
addr = (long) dl_getrange(size + HDR_SIZE);
|
|
dprintf(("trying to use addr %lx-%lx for shared arena\n", addr, addr+size));
|
|
errno = 0;
|
|
if ((addr = usconfig(CONF_ATTACHADDR, addr)) < 0 && errno != 0)
|
|
perror("usconfig - CONF_ATTACHADDR (set)");
|
|
#endif /* USE_DL */
|
|
if (usconfig(CONF_INITUSERS, 16) < 0)
|
|
perror("usconfig - CONF_INITUSERS");
|
|
my_pid = getpid(); /* so that we know which is the main thread */
|
|
#ifndef NO_EXIT_PROG
|
|
atexit(maybe_exit);
|
|
s.sa_handler = exit_sig;
|
|
sigemptyset(&s.sa_mask);
|
|
/*sigaddset(&s.sa_mask, SIGUSR1);*/
|
|
s.sa_flags = 0;
|
|
sigaction(SIGUSR1, &s, 0);
|
|
if (prctl(PR_SETEXITSIG, SIGUSR1) < 0)
|
|
perror("prctl - PR_SETEXITSIG");
|
|
#endif /* NO_EXIT_PROG */
|
|
if (usconfig(CONF_ARENATYPE, US_SHAREDONLY) < 0)
|
|
perror("usconfig - CONF_ARENATYPE");
|
|
usconfig(CONF_LOCKTYPE, US_DEBUG); /* XXX */
|
|
#ifdef DEBUG
|
|
if (thread_debug & 4)
|
|
usconfig(CONF_LOCKTYPE, US_DEBUGPLUS);
|
|
else if (thread_debug & 2)
|
|
usconfig(CONF_LOCKTYPE, US_DEBUG);
|
|
#endif /* DEBUG */
|
|
if ((shared_arena = usinit(tmpnam(0))) == 0)
|
|
perror("usinit");
|
|
#ifdef USE_DL
|
|
if (usconfig(CONF_ATTACHADDR, addr) < 0) /* reset address */
|
|
perror("usconfig - CONF_ATTACHADDR (reset)");
|
|
#endif /* USE_DL */
|
|
if ((count_lock = usnewlock(shared_arena)) == NULL)
|
|
perror("usnewlock (count_lock)");
|
|
(void) usinitlock(count_lock);
|
|
if ((wait_lock = usnewlock(shared_arena)) == NULL)
|
|
perror("usnewlock (wait_lock)");
|
|
dprintf(("arena start: %lx, arena size: %ld\n", (long) shared_arena, (long) usconfig(CONF_GETSIZE, shared_arena)));
|
|
}
|
|
|
|
/*
|
|
* Thread support.
|
|
*/
|
|
|
|
static void clean_threads _P0()
|
|
{
|
|
int i, j;
|
|
pid_t mypid, pid;
|
|
|
|
/* clean up any exited threads */
|
|
mypid = getpid();
|
|
i = 0;
|
|
while (i < maxpidindex) {
|
|
if (pidlist[i].parent == mypid && (pid = pidlist[i].child) > 0) {
|
|
pid = waitpid(pid, 0, WNOHANG);
|
|
if (pid > 0) {
|
|
/* a thread has exited */
|
|
pidlist[i] = pidlist[--maxpidindex];
|
|
/* remove references to children of dead proc */
|
|
for (j = 0; j < maxpidindex; j++)
|
|
if (pidlist[j].parent == pid)
|
|
pidlist[j].child = -1;
|
|
continue; /* don't increment i */
|
|
}
|
|
}
|
|
i++;
|
|
}
|
|
/* clean up the list */
|
|
i = 0;
|
|
while (i < maxpidindex) {
|
|
if (pidlist[i].child == -1) {
|
|
pidlist[i] = pidlist[--maxpidindex];
|
|
continue; /* don't increment i */
|
|
}
|
|
i++;
|
|
}
|
|
}
|
|
|
|
int start_new_thread _P2(func, void (*func) _P((void *)), arg, void *arg)
|
|
{
|
|
#ifdef USE_DL
|
|
long addr, size;
|
|
static int local_initialized = 0;
|
|
#endif /* USE_DL */
|
|
int success = 0; /* init not needed when SOLARIS_THREADS and */
|
|
/* C_THREADS implemented properly */
|
|
|
|
dprintf(("start_new_thread called\n"));
|
|
if (!initialized)
|
|
init_thread();
|
|
switch (ussetlock(count_lock)) {
|
|
case 0: return 0;
|
|
case -1: perror("ussetlock (count_lock)");
|
|
}
|
|
if (maxpidindex >= MAXPROC)
|
|
success = -1;
|
|
else {
|
|
#ifdef USE_DL
|
|
if (!local_initialized) {
|
|
if ((size = usconfig(CONF_INITSIZE, 64*1024)) < 0)
|
|
perror("usconfig - CONF_INITSIZE (check)");
|
|
if (usconfig(CONF_INITSIZE, size) < 0)
|
|
perror("usconfig - CONF_INITSIZE (reset)");
|
|
addr = (long) dl_getrange(size + HDR_SIZE);
|
|
dprintf(("trying to use addr %lx-%lx for sproc\n",
|
|
addr, addr+size));
|
|
errno = 0;
|
|
if ((addr = usconfig(CONF_ATTACHADDR, addr)) < 0 &&
|
|
errno != 0)
|
|
perror("usconfig - CONF_ATTACHADDR (set)");
|
|
}
|
|
#endif /* USE_DL */
|
|
clean_threads();
|
|
if ((success = sproc(func, PR_SALL, arg)) < 0)
|
|
perror("sproc");
|
|
#ifdef USE_DL
|
|
if (!local_initialized) {
|
|
if (usconfig(CONF_ATTACHADDR, addr) < 0)
|
|
/* reset address */
|
|
perror("usconfig - CONF_ATTACHADDR (reset)");
|
|
local_initialized = 1;
|
|
}
|
|
#endif /* USE_DL */
|
|
if (success >= 0) {
|
|
nthreads++;
|
|
pidlist[maxpidindex].parent = getpid();
|
|
pidlist[maxpidindex++].child = success;
|
|
dprintf(("pidlist[%d] = %d\n",
|
|
maxpidindex-1, success));
|
|
}
|
|
}
|
|
if (usunsetlock(count_lock) < 0)
|
|
perror("usunsetlock (count_lock)");
|
|
return success < 0 ? 0 : 1;
|
|
}
|
|
|
|
long get_thread_ident _P0()
|
|
{
|
|
return getpid();
|
|
}
|
|
|
|
static void do_exit_thread _P1(no_cleanup, int no_cleanup)
|
|
{
|
|
dprintf(("exit_thread called\n"));
|
|
if (!initialized)
|
|
if (no_cleanup)
|
|
_exit(0);
|
|
else
|
|
exit(0);
|
|
if (ussetlock(count_lock) < 0)
|
|
perror("ussetlock (count_lock)");
|
|
nthreads--;
|
|
if (getpid() == my_pid) {
|
|
/* main thread; wait for other threads to exit */
|
|
exiting = 1;
|
|
#ifndef NO_EXIT_PROG
|
|
if (do_exit) {
|
|
int i;
|
|
|
|
/* notify other threads */
|
|
clean_threads();
|
|
if (nthreads >= 0) {
|
|
dprintf(("kill other threads\n"));
|
|
for (i = 0; i < maxpidindex; i++)
|
|
if (pidlist[i].child > 0)
|
|
(void) kill(pidlist[i].child,
|
|
SIGKILL);
|
|
_exit(exit_status);
|
|
}
|
|
}
|
|
#endif /* NO_EXIT_PROG */
|
|
waiting_for_threads = 1;
|
|
if (ussetlock(wait_lock) < 0)
|
|
perror("ussetlock (wait_lock)");
|
|
for (;;) {
|
|
if (nthreads < 0) {
|
|
dprintf(("really exit (%d)\n", exit_status));
|
|
if (no_cleanup)
|
|
_exit(exit_status);
|
|
else
|
|
exit(exit_status);
|
|
}
|
|
if (usunsetlock(count_lock) < 0)
|
|
perror("usunsetlock (count_lock)");
|
|
dprintf(("waiting for other threads (%d)\n", nthreads));
|
|
if (ussetlock(wait_lock) < 0)
|
|
perror("ussetlock (wait_lock)");
|
|
if (ussetlock(count_lock) < 0)
|
|
perror("ussetlock (count_lock)");
|
|
}
|
|
}
|
|
/* not the main thread */
|
|
if (waiting_for_threads) {
|
|
dprintf(("main thread is waiting\n"));
|
|
if (usunsetlock(wait_lock) < 0)
|
|
perror("usunsetlock (wait_lock)");
|
|
}
|
|
#ifndef NO_EXIT_PROG
|
|
else if (do_exit)
|
|
(void) kill(my_pid, SIGUSR1);
|
|
#endif /* NO_EXIT_PROG */
|
|
if (usunsetlock(count_lock) < 0)
|
|
perror("usunsetlock (count_lock)");
|
|
_exit(0);
|
|
}
|
|
|
|
void exit_thread _P0()
|
|
{
|
|
do_exit_thread(0);
|
|
}
|
|
|
|
void _exit_thread _P0()
|
|
{
|
|
do_exit_thread(1);
|
|
}
|
|
|
|
#ifndef NO_EXIT_PROG
|
|
static void do_exit_prog _P2(status, int status, no_cleanup, int no_cleanup)
|
|
{
|
|
dprintf(("exit_prog(%d) called\n", status));
|
|
if (!initialized)
|
|
if (no_cleanup)
|
|
_exit(status);
|
|
else
|
|
exit(status);
|
|
do_exit = 1;
|
|
exit_status = status;
|
|
do_exit_thread(no_cleanup);
|
|
}
|
|
|
|
void exit_prog _P1(status, int status)
|
|
{
|
|
do_exit_prog(status, 0);
|
|
}
|
|
|
|
void _exit_prog _P1(status, int status)
|
|
{
|
|
do_exit_prog(status, 1);
|
|
}
|
|
#endif /* NO_EXIT_PROG */
|
|
|
|
/*
|
|
* Lock support.
|
|
*/
|
|
type_lock allocate_lock _P0()
|
|
{
|
|
ulock_t lock;
|
|
|
|
dprintf(("allocate_lock called\n"));
|
|
if (!initialized)
|
|
init_thread();
|
|
|
|
if ((lock = usnewlock(shared_arena)) == NULL)
|
|
perror("usnewlock");
|
|
(void) usinitlock(lock);
|
|
dprintf(("allocate_lock() -> %lx\n", (long)lock));
|
|
return (type_lock) lock;
|
|
}
|
|
|
|
void free_lock _P1(lock, type_lock lock)
|
|
{
|
|
dprintf(("free_lock(%lx) called\n", (long)lock));
|
|
usfreelock((ulock_t) lock, shared_arena);
|
|
}
|
|
|
|
int acquire_lock _P2(lock, type_lock lock, waitflag, int waitflag)
|
|
{
|
|
int success;
|
|
|
|
dprintf(("acquire_lock(%lx, %d) called\n", (long)lock, waitflag));
|
|
errno = 0; /* clear it just in case */
|
|
if (waitflag)
|
|
success = ussetlock((ulock_t) lock);
|
|
else
|
|
success = uscsetlock((ulock_t) lock, 1); /* Try it once */
|
|
if (success < 0)
|
|
perror(waitflag ? "ussetlock" : "uscsetlock");
|
|
dprintf(("acquire_lock(%lx, %d) -> %d\n", (long)lock, waitflag, success));
|
|
return success;
|
|
}
|
|
|
|
void release_lock _P1(lock, type_lock lock)
|
|
{
|
|
dprintf(("release_lock(%lx) called\n", (long)lock));
|
|
if (usunsetlock((ulock_t) lock) < 0)
|
|
perror("usunsetlock");
|
|
}
|
|
|
|
/*
|
|
* Semaphore support.
|
|
*/
|
|
type_sema allocate_sema _P1(value, int value)
|
|
{
|
|
usema_t *sema;
|
|
dprintf(("allocate_sema called\n"));
|
|
if (!initialized)
|
|
init_thread();
|
|
|
|
if ((sema = usnewsema(shared_arena, value)) == NULL)
|
|
perror("usnewsema");
|
|
dprintf(("allocate_sema() -> %lx\n", (long) sema));
|
|
return (type_sema) sema;
|
|
}
|
|
|
|
void free_sema _P1(sema, type_sema sema)
|
|
{
|
|
dprintf(("free_sema(%lx) called\n", (long) sema));
|
|
usfreesema((usema_t *) sema, shared_arena);
|
|
}
|
|
|
|
void down_sema _P1(sema, type_sema sema)
|
|
{
|
|
dprintf(("down_sema(%lx) called\n", (long) sema));
|
|
if (uspsema((usema_t *) sema) < 0)
|
|
perror("uspsema");
|
|
dprintf(("down_sema(%lx) return\n", (long) sema));
|
|
}
|
|
|
|
void up_sema _P1(sema, type_sema sema)
|
|
{
|
|
dprintf(("up_sema(%lx)\n", (long) sema));
|
|
if (usvsema((usema_t *) sema) < 0)
|
|
perror("usvsema");
|
|
}
|