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authorRichard Braun <rbraun@sceen.net>2019-01-10 23:27:59 +0100
committerRichard Braun <rbraun@sceen.net>2019-01-10 23:27:59 +0100
commit5ce63fc5a34b3be947120478a9aa0a00d071257f (patch)
tree354dc92bd3db93dfb274a07ac91b7d451c3b0053
parent9b40330cdc9399acb3687cbccb7696b4fd9feb0e (diff)
test/test_semaphore: new module
-rw-r--r--test/Kconfig3
-rw-r--r--test/Makefile1
-rw-r--r--test/test_semaphore.c111
3 files changed, 115 insertions, 0 deletions
diff --git a/test/Kconfig b/test/Kconfig
index d3cd9b5e..0d8fee90 100644
--- a/test/Kconfig
+++ b/test/Kconfig
@@ -52,6 +52,9 @@ config TEST_MODULE_PMAP_UPDATE_MP
config TEST_MODULE_RCU_DEFER
bool "rcu_defer"
+config TEST_MODULE_SEMAPHORE
+ bool "semaphore"
+
config TEST_MODULE_SREF_DIRTY_ZEROES
bool "sref_dirty_zeroes"
diff --git a/test/Makefile b/test/Makefile
index 81e615cf..b80a9033 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -7,6 +7,7 @@ x15_SOURCES-$(CONFIG_TEST_MODULE_PERFMON_THREAD) += test/test_perfmon_thr
x15_SOURCES-$(CONFIG_TEST_MODULE_PERFMON_TORTURE) += test/test_perfmon_torture.c
x15_SOURCES-$(CONFIG_TEST_MODULE_PMAP_UPDATE_MP) += test/test_pmap_update_mp.c
x15_SOURCES-$(CONFIG_TEST_MODULE_RCU_DEFER) += test/test_rcu_defer.c
+x15_SOURCES-$(CONFIG_TEST_MODULE_SEMAPHORE) += test/test_semaphore.c
x15_SOURCES-$(CONFIG_TEST_MODULE_SREF_DIRTY_ZEROES) += test/test_sref_dirty_zeroes.c
x15_SOURCES-$(CONFIG_TEST_MODULE_SREF_NOREF) += test/test_sref_noref.c
x15_SOURCES-$(CONFIG_TEST_MODULE_SREF_WEAKREF) += test/test_sref_weakref.c
diff --git a/test/test_semaphore.c b/test/test_semaphore.c
new file mode 100644
index 00000000..299273ea
--- /dev/null
+++ b/test/test_semaphore.c
@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2019 Richard Braun.
+ *
+ * This program 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ * This test creates a number of threads (at least 2) which wait on a
+ * semaphore, and one that posts the semaphore as many times as there
+ * are threads. All threads are bound to the same processor, and posts
+ * are performed with preemption disabled, to guarantee they occur
+ * back-to-back in order to make sure that they're not missed.
+ */
+
+#include <stddef.h>
+#include <stdio.h>
+
+#include <kern/cpumap.h>
+#include <kern/error.h>
+#include <kern/log.h>
+#include <kern/macros.h>
+#include <kern/semaphore.h>
+#include <kern/thread.h>
+#include <test/test.h>
+
+#define TEST_NR_WAITERS 2
+
+#if TEST_NR_WAITERS < 2
+#error "invalid number of waiters"
+#endif /* TEST_NR_WAITERS < 2 */
+
+static struct semaphore test_semaphore;
+
+static struct thread *test_waiters[TEST_NR_WAITERS];
+
+static void
+test_wait(void *arg)
+{
+ (void)arg;
+
+ semaphore_wait(&test_semaphore);
+}
+
+static void
+test_post(void *arg)
+{
+ int error;
+
+ (void)arg;
+
+ for (size_t i = 0; i < ARRAY_SIZE(test_waiters); i++) {
+ while (thread_state(test_waiters[i]) != THREAD_SLEEPING) {
+ thread_delay(1, false);
+ }
+ }
+
+ thread_preempt_disable();
+
+ for (size_t i = 0; i < ARRAY_SIZE(test_waiters); i++) {
+ error = semaphore_post(&test_semaphore);
+ error_check(error, "semaphore_post");
+ }
+
+ thread_preempt_enable();
+
+ for (size_t i = 0; i < ARRAY_SIZE(test_waiters); i++) {
+ thread_join(test_waiters[i]);
+ }
+
+ log_info("test: done");
+}
+
+void __init
+test_setup(void)
+{
+ char name[THREAD_NAME_SIZE];
+ struct thread_attr attr;
+ struct cpumap *cpumap;
+ int error;
+
+ semaphore_init(&test_semaphore, 0, TEST_NR_WAITERS);
+
+ error = cpumap_create(&cpumap);
+ error_check(error, "cpumap_create");
+ cpumap_zero(cpumap);
+ cpumap_set(cpumap, 0);
+
+ for (size_t i = 0; i < ARRAY_SIZE(test_waiters); i++) {
+ snprintf(name, sizeof(name), THREAD_KERNEL_PREFIX "test_wait:%zu", i);
+ thread_attr_init(&attr, name);
+ thread_attr_set_cpumap(&attr, cpumap);
+ error = thread_create(&test_waiters[i], &attr, test_wait, NULL);
+ error_check(error, "thread_create");
+ }
+
+ thread_attr_init(&attr, THREAD_KERNEL_PREFIX "test_post");
+ thread_attr_set_detached(&attr);
+ thread_attr_set_cpumap(&attr, cpumap);
+ error = thread_create(NULL, &attr, test_post, NULL);
+ error_check(error, "thread_create");
+}