support for read/write-lock and read/write-trylock

Change-Id: I609071c0f6234d0d413c8b312d8a8379abf6846e
Refs: #1323

test/issues/1323/rwlock.c

@@ -0,0 +1,74 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+#include <pthread.h>
+#include <errno.h>
+
+int cmd;
+int procs;
+int rc;
+
+void *
+rwtest(void *arg)
+{
+	int r = syscall(750, cmd, procs);
+
+	if (r)
+		rc = 1;
+
+	return NULL;
+}
+
+int
+main(int argc, char **argv)
+{
+	pthread_t *threads;
+	int i;
+
+	if (!argv[1]) {
+		long val = syscall(750, 10);
+		int running = syscall(750, 11);
+		long lockval = syscall(750, 12);
+
+		fprintf(stderr, "%ld %d %016lx\n", val, running, lockval);
+		exit(0);
+	}
+	cmd = atoi(argv[1]);
+	if (cmd < 1 || cmd > 4) {
+		fprintf(stderr, "invalid test ID (%s)\n", argv[1]);
+		exit(1);
+	}
+	if (!argv[2]) {
+		fprintf(stderr, "no procs present\n");
+		exit(1);
+	}
+	procs = atoi(argv[2]);
+	if (procs < 1) {
+		fprintf(stderr, "invalid procs (%s)\n", argv[2]);
+		exit(1);
+	}
+	if (syscall(750, 0) == -1) {
+		fprintf(stderr, "invalid test environment\n");
+		exit(1);
+	}
+	threads = malloc(sizeof(pthread_t) * procs);
+	for (i = 0; i < procs; i++) {
+		if (pthread_create(threads + i, NULL, rwtest, NULL)) {
+			fprintf(stderr, "pthread_create: %s\n",
+				strerror(errno));
+			exit(1);
+		}
+	}
+	rc = 0;
+	for (i = 0; i < procs; i++) {
+		pthread_join(threads[i], NULL);
+	}
+	if (rc) {
+		fprintf(stderr, "rwlock test %d FAIL\n", cmd);
+		exit(1);
+	}
+	fprintf(stderr, "rwlock test %d PASS\n", cmd);
+	exit(0);
+}