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-rw-r--r--pretty-printers/test-rwlock-printer.c78
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diff --git a/pretty-printers/test-rwlock-printer.c b/pretty-printers/test-rwlock-printer.c
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+/* Helper program for testing the pthread_rwlock_t pretty printer.
+
+ Copyright (C) 2016 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+/* Keep the calls to the pthread_* functions on separate lines to make it easy
+ to advance through the program using the gdb 'next' command. */
+
+#include <pthread.h>
+
+#define PASS 0
+#define FAIL 1
+
+static int test_locking_reader (pthread_rwlock_t *rwlock);
+static int test_locking_writer (pthread_rwlock_t *rwlock);
+
+int
+main (void)
+{
+ pthread_rwlock_t rwlock;
+
+ int result = FAIL;
+
+ if (test_locking_reader (&rwlock) == PASS
+ && test_locking_writer (&rwlock) == PASS)
+ result = PASS;
+ /* Else, one of the pthread_rwlock* functions failed. */
+
+ return result;
+}
+
+/* Tests locking the rwlock multiple times as a reader. */
+static int
+test_locking_reader (pthread_rwlock_t *rwlock)
+{
+ int result = FAIL;
+
+ if (pthread_rwlock_init (rwlock, NULL) == 0
+ && pthread_rwlock_rdlock (rwlock) == 0 /* Test locking (reader). */
+ && pthread_rwlock_rdlock (rwlock) == 0
+ && pthread_rwlock_rdlock (rwlock) == 0
+ && pthread_rwlock_unlock (rwlock) == 0
+ && pthread_rwlock_unlock (rwlock) == 0
+ && pthread_rwlock_unlock (rwlock) == 0
+ && pthread_rwlock_destroy (rwlock) == 0)
+ result = PASS;
+
+ return result;
+}
+
+/* Tests locking the rwlock as a writer. */
+static int
+test_locking_writer (pthread_rwlock_t *rwlock)
+{
+ int result = FAIL;
+
+ if (pthread_rwlock_init (rwlock, NULL) == 0
+ && pthread_rwlock_wrlock (rwlock) == 0 /* Test locking (writer). */
+ && pthread_rwlock_unlock (rwlock) == 0
+ && pthread_rwlock_destroy (rwlock) == 0)
+ result = PASS;
+
+ return result;
+}