+/* $Id: tstflock.c,v 1.16.2.1 2006-10-23 11:37:11 adam Exp $
+ Copyright (C) 1995-2006
+ Index Data ApS
+
+This file is part of the Zebra server.
+
+Zebra is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 2, or (at your option) any later
+version.
+
+Zebra is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+*/
+
+#include <assert.h>
+#include <stdlib.h>
+#include <yaz/test.h>
+#include <yaz/log.h>
+#if HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+#include <time.h>
+
+#if HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#if HAVE_SYS_WAIT_H
+#include <sys/wait.h>
+#endif
+
+#include <fcntl.h>
+
+#ifdef WIN32
+#include <io.h>
+#endif
+
+#if YAZ_POSIX_THREADS
+#include <pthread.h>
+#endif
+#ifdef WIN32
+#include <windows.h>
+#include <process.h>
+#endif
+
+#include <zebra-flock.h>
+#include <string.h>
+
+static char seq[1000];
+static char *seqp = 0;
+
+#define NUM_THREADS 100
+
+#if YAZ_POSIX_THREADS
+pthread_cond_t sleep_cond = PTHREAD_COND_INITIALIZER;
+pthread_mutex_t sleep_mutex = PTHREAD_MUTEX_INITIALIZER;
+#endif
+
+int test_fd = 0;
+
+static void small_sleep()
+{
+#ifdef WIN32
+ Sleep(2);
+#else
+#if YAZ_POSIX_THREADS
+ struct timespec abstime;
+ struct timeval now;
+
+ gettimeofday(&now, 0);
+ abstime.tv_sec = now.tv_sec;
+ abstime.tv_nsec = 1000000 + now.tv_usec * 1000;
+ if (abstime.tv_nsec > 1000000000) /* 1s = 1e9 ns */
+ {
+ abstime.tv_nsec -= 1000000000;
+ abstime.tv_sec++;
+ }
+ pthread_mutex_lock(&sleep_mutex);
+ pthread_cond_timedwait(&sleep_cond, &sleep_mutex, &abstime);
+ pthread_mutex_unlock(&sleep_mutex);
+#endif
+#endif
+}
+
+void *run_func(void *arg)
+{
+ int i;
+ int *pdata = (int*) arg;
+ int use_write_lock = *pdata;
+ ZebraLockHandle lh = zebra_lock_create(0, "my.LCK");
+ for (i = 0; i<2; i++)
+ {
+ int write_lock = use_write_lock;
+
+ if (use_write_lock == 2) /* random lock */
+ write_lock = (rand() & 3) == 3 ? 1 : 0;
+
+ if (write_lock)
+ {
+ zebra_lock_w(lh);
+
+ write(test_fd, "L", 1);
+ *seqp++ = 'L';
+ small_sleep();
+ *seqp++ = 'U';
+ write(test_fd, "U", 1);
+
+ zebra_unlock(lh);
+ }
+ else
+ {
+ zebra_lock_r(lh);
+
+ write(test_fd, "l", 1);
+ *seqp++ = 'l';
+ small_sleep();
+ *seqp++ = 'u';
+ write(test_fd, "u", 1);
+
+ zebra_unlock(lh);
+ }
+ }
+ zebra_lock_destroy(lh);
+ *pdata = 123;
+ return 0;
+}
+
+#ifdef WIN32
+DWORD WINAPI ThreadProc(void *p)
+{
+ run_func(p);
+ return 0;
+}
+#endif
+
+static void tst_thread(int num, int write_flag)
+{
+#ifdef WIN32
+ HANDLE handles[NUM_THREADS];
+ DWORD dwThreadId[NUM_THREADS];
+#endif
+#if YAZ_POSIX_THREADS
+ pthread_t child_thread[NUM_THREADS];
+#endif
+ int i, id[NUM_THREADS];
+
+ seqp = seq;
+ assert (num <= NUM_THREADS);
+ for (i = 0; i < num; i++)
+ {
+ id[i] = write_flag;
+#if YAZ_POSIX_THREADS
+ pthread_create(&child_thread[i], 0 /* attr */, run_func, &id[i]);
+#endif
+#ifdef WIN32
+ if (1)
+ {
+ void *pData = &id[i];
+ handles[i] = CreateThread(
+ NULL, /* default security attributes */
+ 0, /* use default stack size */
+ ThreadProc, /* thread function */
+ pData, /* argument to thread function */
+ 0, /* use default creation flags */
+ &dwThreadId[i]); /* returns the thread identifier */
+ }
+
+#endif
+ }
+#if YAZ_POSIX_THREADS
+ for (i = 0; i<num; i++)
+ pthread_join(child_thread[i], 0);
+#endif
+#ifdef WIN32
+ WaitForMultipleObjects(num, handles, TRUE, INFINITE);
+#endif
+ for (i = 0; i < num; i++)
+ YAZ_CHECK(id[i] == 123);
+ *seqp++ = '\0';
+ logf(LOG_LOG, "tst_thread(%d,%d) returns seq=%s",
+ num, write_flag, seq);
+}
+
+static void tst()
+{
+ tst_thread(4, 1); /* write locks */
+ if (1)
+ {
+ int i = 0;
+ while (seq[i])
+ {
+ YAZ_CHECK_EQ(seq[i], 'L');
+ YAZ_CHECK_EQ(seq[i+1], 'U');
+ i = i + 2;
+ }
+ }
+
+ tst_thread(6, 0); /* read locks */
+
+ tst_thread(20, 2); /* random locks */
+}
+
+void fork_tst()
+{
+#if HAVE_SYS_WAIT_H
+ pid_t pid[2];
+ int i;
+
+ for (i = 0; i<2; i++)
+ {
+ pid[i] = fork();
+ if (!pid[i])
+ {
+ tst();
+ exit(0);
+ }
+ }
+ for (i = 0; i<2; i++)
+ {
+ int status;
+ waitpid(pid[i], &status, 0);
+ YAZ_CHECK(status == 0);
+ }
+#else
+ tst();
+#endif
+}
+
+int main(int argc, char **argv)
+{
+ char logname[220];
+ YAZ_CHECK_INIT(argc, argv);
+
+ sprintf(logname, "%.200s.log", argv[0]);
+ yaz_log_init_file(logname);
+
+ /* ensure the flock system logs in our test */
+ yaz_log_init_level(yaz_log_mask_str("flock"));
+
+ zebra_flock_init();
+
+ test_fd = open("tstflock.out", (O_BINARY|O_CREAT|O_RDWR), 0666);
+ YAZ_CHECK(test_fd != -1);
+ if (test_fd != -1)
+ {
+ fork_tst();
+ }
+ YAZ_CHECK_TERM;
+}
+
+
+/*
+ * Local variables:
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ * vim: shiftwidth=4 tabstop=8 expandtab
+ */
+