1 files changed, 82 insertions, 0 deletions
diff --git a/mit-pthreads/tests/p_bench_semaphore.c b/mit-pthreads/tests/p_bench_semaphore.c
new file mode 100644
index 00000000000..b3bce340b95
--- /dev/null
+++ b/mit-pthreads/tests/p_bench_semaphore.c
@@ -0,0 +1,82 @@
+/* ==== p_bench_semaphore.c =================================================
+ * Copyright (c) 1993 by Chris Provenzano, proven@athena.mit.edu
+ *
+ * Description : Benchmark semaphore Test and Set/ CLear times
+ *
+ *  1.00 93/11/08 proven
+ *      -Started coding this file.
+ */
+
+#include <errno.h>
+#include <pthread.h>
+#include <stdio.h>
+
+#define	OK		0
+#define	NOTOK  -1
+
+/* ==========================================================================
+ * usage();
+ */
+void usage(void)
+{
+	printf("getopt [-d?] [-c count]\n");
+    errno = 0;
+}
+
+main(int argc, char **argv)
+{
+	struct timeval starttime, endtime;
+	semaphore lock = SEMAPHORE_CLEAR;
+	semaphore *lock_addr;
+	int count = 1000000;
+	int debug = 0;
+	int i;
+
+	char word[256];
+
+    /* Getopt variables. */
+    extern int optind, opterr;
+    extern char *optarg;
+
+	pthread_init();
+
+	while ((word[0] = getopt(argc, argv, "c:d?")) != (char)EOF) {
+		switch (word[0]) {
+		case 'd':
+			debug++;
+			break;
+		case 'c':
+			count = atoi(optarg);
+			break;
+		case '?':
+			usage();
+			return(OK);
+		default:
+			usage();
+			return(NOTOK);
+		}
+	}
+
+	lock_addr = &lock;
+	if (gettimeofday(&starttime, NULL)) {
+		perror ("gettimeofday");
+		return 1;
+	}
+	for (i = 0; i < count; i++) {
+		if (SEMAPHORE_TEST_AND_SET(lock_addr)) {
+			printf("Semaphore already locked error\n");
+			return 1;
+		}
+		SEMAPHORE_RESET(lock_addr);
+	}
+	if (gettimeofday(&endtime, NULL)) {
+		perror ("gettimeofday");
+		return 1;
+	}
+
+	printf("%d locks/unlocks of a semaphore took %d usecs.\n", count, 
+		(endtime.tv_sec - starttime.tv_sec) * 1000000 +
+		(endtime.tv_usec - starttime.tv_usec));
+
+	return 0;
+}