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Unified Diff: Python/thread_sgi.h

Issue 11863: Enforce PEP 11 - remove support for legacy systems
Patch Set: Created 8 years, 7 months ago
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deleted file mode 100644
--- a/Python/thread_sgi.h
+++ /dev/null
@@ -1,259 +0,0 @@
-
-#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;
-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 */
-/*
- * Initialization.
- */
-static void PyThread__init_thread(void)
-{
-#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 %p-%p 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 */
- if (usconfig(CONF_ARENATYPE, US_SHAREDONLY) < 0)
- perror("usconfig - CONF_ARENATYPE");
- usconfig(CONF_LOCKTYPE, US_DEBUG); /* XXX */
-#ifdef Py_DEBUG
- if (thread_debug & 4)
- usconfig(CONF_LOCKTYPE, US_DEBUGPLUS);
- else if (thread_debug & 2)
- usconfig(CONF_LOCKTYPE, US_DEBUG);
-#endif /* Py_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: %p, arena size: %ld\n", shared_arena, (long) usconfig(CONF_GETSIZE, shared_arena)));
-}
-
-/*
- * Thread support.
- */
-
-static void clean_threads(void)
-{
- 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++;
- }
-}
-
-long PyThread_start_new_thread(void (*func)(void *), 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(("PyThread_start_new_thread called\n"));
- if (!initialized)
- PyThread_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 %p-%p 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;
-}
-
-long PyThread_get_thread_ident(void)
-{
- return getpid();
-}
-
-void PyThread_exit_thread(void)
-{
- dprintf(("PyThread_exit_thread called\n"));
- if (!initialized)
- 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;
- waiting_for_threads = 1;
- if (ussetlock(wait_lock) < 0)
- perror("ussetlock (wait_lock)");
- for (;;) {
- if (nthreads < 0) {
- dprintf(("really exit (%d)\n", exit_status));
- 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)");
- }
- if (usunsetlock(count_lock) < 0)
- perror("usunsetlock (count_lock)");
- _exit(0);
-}
-
-/*
- * Lock support.
- */
-PyThread_type_lock PyThread_allocate_lock(void)
-{
- ulock_t lock;
-
- dprintf(("PyThread_allocate_lock called\n"));
- if (!initialized)
- PyThread_init_thread();
-
- if ((lock = usnewlock(shared_arena)) == NULL)
- perror("usnewlock");
- (void) usinitlock(lock);
- dprintf(("PyThread_allocate_lock() -> %p\n", lock));
- return (PyThread_type_lock) lock;
-}
-
-void PyThread_free_lock(PyThread_type_lock lock)
-{
- dprintf(("PyThread_free_lock(%p) called\n", lock));
- usfreelock((ulock_t) lock, shared_arena);
-}
-
-int PyThread_acquire_lock(PyThread_type_lock lock, int waitflag)
-{
- int success;
-
- dprintf(("PyThread_acquire_lock(%p, %d) called\n", 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(("PyThread_acquire_lock(%p, %d) -> %d\n", lock, waitflag, success));
- return success;
-}
-
-void PyThread_release_lock(PyThread_type_lock lock)
-{
- dprintf(("PyThread_release_lock(%p) called\n", lock));
- if (usunsetlock((ulock_t) lock) < 0)
- perror("usunsetlock");
-}
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