From 1313875b02c690ca5a40e585d24fdec240bb419d Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@tavianator.com>
Date: Mon, 26 Jun 2023 15:04:13 -0400
Subject: thread: Wrap more pthread APIs

---
 src/thread.h | 103 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 src/thread.h

(limited to 'src/thread.h')

diff --git a/src/thread.h b/src/thread.h
new file mode 100644
index 0000000..b2edf17
--- /dev/null
+++ b/src/thread.h
@@ -0,0 +1,103 @@
+// Copyright © Tavian Barnes <tavianator@tavianator.com>
+// SPDX-License-Identifier: 0BSD
+
+/**
+ * Wrappers for POSIX threading APIs.
+ */
+
+#ifndef BFS_THREAD_H
+#define BFS_THREAD_H
+
+#include "diag.h"
+#include <errno.h>
+#include <pthread.h>
+#include <string.h>
+
+#define thread_verify(expr, cond) \
+	bfs_verify((errno = (expr), (cond)), "%s: %s", #expr, strerror(errno))
+
+/**
+ * Wrapper for pthread_create().
+ *
+ * @return
+ *         0 on success, -1 on error.
+ */
+#define thread_create(thread, attr, fn, arg) \
+	((errno = pthread_create(thread, attr, fn, arg)) ? -1 : 0)
+
+/**
+ * Wrapper for pthread_join().
+ */
+#define thread_join(thread, ret) \
+	thread_verify(pthread_join(thread, ret), errno == 0)
+
+/**
+ * Wrapper for pthread_mutex_init().
+ */
+#define mutex_init(mutex, attr) \
+	((errno = pthread_mutex_init(mutex, attr)) ? -1 : 0)
+
+/**
+ * Wrapper for pthread_mutex_lock().
+ */
+#define mutex_lock(mutex) \
+	thread_verify(pthread_mutex_lock(mutex), errno == 0)
+
+/**
+ * Wrapper for pthread_mutex_trylock().
+ *
+ * @return
+ *         Whether the mutex was locked.
+ */
+#define mutex_trylock(mutex) \
+	(thread_verify(pthread_mutex_trylock(mutex), errno == 0 || errno == EBUSY), errno == 0)
+
+/**
+ * Wrapper for pthread_mutex_unlock().
+ */
+#define mutex_unlock(mutex) \
+	thread_verify(pthread_mutex_unlock(mutex), errno == 0)
+
+/**
+ * Wrapper for pthread_mutex_destroy().
+ */
+#define mutex_destroy(mutex) \
+	thread_verify(pthread_mutex_destroy(mutex), errno == 0)
+
+/**
+ * Wrapper for pthread_cond_init().
+ */
+#define cond_init(cond, attr) \
+	((errno = pthread_cond_init(cond, attr)) ? -1 : 0)
+
+/**
+ * Wrapper for pthread_cond_wait().
+ */
+#define cond_wait(cond, mutex) \
+	thread_verify(pthread_cond_wait(cond, mutex), errno == 0)
+
+/**
+ * Wrapper for pthread_cond_signal().
+ */
+#define cond_signal(cond) \
+	thread_verify(pthread_cond_signal(cond), errno == 0)
+
+/**
+ * Wrapper for pthread_cond_broadcast().
+ */
+#define cond_broadcast(cond) \
+	thread_verify(pthread_cond_broadcast(cond), errno == 0)
+
+/**
+ * Wrapper for pthread_cond_destroy().
+ */
+#define cond_destroy(cond) \
+	thread_verify(pthread_cond_destroy(cond), errno == 0)
+
+/**
+ * Wrapper for pthread_once().
+ */
+#define call_once(once, fn) \
+	thread_verify(pthread_once(once, fn), errno == 0)
+
+#endif // BFS_THREAD_H
-- 
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