summaryrefslogtreecommitdiffstats
path: root/tools/perf/util/mutex.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /tools/perf/util/mutex.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/perf/util/mutex.c')
-rw-r--r--tools/perf/util/mutex.c119
1 files changed, 119 insertions, 0 deletions
diff --git a/tools/perf/util/mutex.c b/tools/perf/util/mutex.c
new file mode 100644
index 0000000000..bca7f0717f
--- /dev/null
+++ b/tools/perf/util/mutex.c
@@ -0,0 +1,119 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "mutex.h"
+
+#include "debug.h"
+#include <linux/string.h>
+#include <errno.h>
+
+static void check_err(const char *fn, int err)
+{
+ char sbuf[STRERR_BUFSIZE];
+
+ if (err == 0)
+ return;
+
+ pr_err("%s error: '%s'\n", fn, str_error_r(err, sbuf, sizeof(sbuf)));
+}
+
+#define CHECK_ERR(err) check_err(__func__, err)
+
+static void __mutex_init(struct mutex *mtx, bool pshared)
+{
+ pthread_mutexattr_t attr;
+
+ CHECK_ERR(pthread_mutexattr_init(&attr));
+
+#ifndef NDEBUG
+ /* In normal builds enable error checking, such as recursive usage. */
+ CHECK_ERR(pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK));
+#endif
+ if (pshared)
+ CHECK_ERR(pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_SHARED));
+
+ CHECK_ERR(pthread_mutex_init(&mtx->lock, &attr));
+ CHECK_ERR(pthread_mutexattr_destroy(&attr));
+}
+
+void mutex_init(struct mutex *mtx)
+{
+ __mutex_init(mtx, /*pshared=*/false);
+}
+
+void mutex_init_pshared(struct mutex *mtx)
+{
+ __mutex_init(mtx, /*pshared=*/true);
+}
+
+void mutex_destroy(struct mutex *mtx)
+{
+ CHECK_ERR(pthread_mutex_destroy(&mtx->lock));
+}
+
+void mutex_lock(struct mutex *mtx)
+ NO_THREAD_SAFETY_ANALYSIS
+{
+ CHECK_ERR(pthread_mutex_lock(&mtx->lock));
+}
+
+void mutex_unlock(struct mutex *mtx)
+ NO_THREAD_SAFETY_ANALYSIS
+{
+ CHECK_ERR(pthread_mutex_unlock(&mtx->lock));
+}
+
+bool mutex_trylock(struct mutex *mtx)
+{
+ int ret = pthread_mutex_trylock(&mtx->lock);
+
+ if (ret == 0)
+ return true; /* Lock acquired. */
+
+ if (ret == EBUSY)
+ return false; /* Lock busy. */
+
+ /* Print error. */
+ CHECK_ERR(ret);
+ return false;
+}
+
+static void __cond_init(struct cond *cnd, bool pshared)
+{
+ pthread_condattr_t attr;
+
+ CHECK_ERR(pthread_condattr_init(&attr));
+ if (pshared)
+ CHECK_ERR(pthread_condattr_setpshared(&attr, PTHREAD_PROCESS_SHARED));
+
+ CHECK_ERR(pthread_cond_init(&cnd->cond, &attr));
+ CHECK_ERR(pthread_condattr_destroy(&attr));
+}
+
+void cond_init(struct cond *cnd)
+{
+ __cond_init(cnd, /*pshared=*/false);
+}
+
+void cond_init_pshared(struct cond *cnd)
+{
+ __cond_init(cnd, /*pshared=*/true);
+}
+
+void cond_destroy(struct cond *cnd)
+{
+ CHECK_ERR(pthread_cond_destroy(&cnd->cond));
+}
+
+void cond_wait(struct cond *cnd, struct mutex *mtx)
+{
+ CHECK_ERR(pthread_cond_wait(&cnd->cond, &mtx->lock));
+}
+
+void cond_signal(struct cond *cnd)
+{
+ CHECK_ERR(pthread_cond_signal(&cnd->cond));
+}
+
+void cond_broadcast(struct cond *cnd)
+{
+ CHECK_ERR(pthread_cond_broadcast(&cnd->cond));
+}