From a4dd0ad63c00f4dee3b86dfd3075d1d61b2b3180 Mon Sep 17 00:00:00 2001
From: sanine <sanine.not@pm.me>
Date: Sat, 27 Aug 2022 23:52:56 -0500
Subject: add plibsys

---
 3rdparty/plibsys/src/pspinlock-sync.c | 83 +++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 3rdparty/plibsys/src/pspinlock-sync.c

(limited to '3rdparty/plibsys/src/pspinlock-sync.c')

diff --git a/3rdparty/plibsys/src/pspinlock-sync.c b/3rdparty/plibsys/src/pspinlock-sync.c
new file mode 100644
index 0000000..e15e2a8
--- /dev/null
+++ b/3rdparty/plibsys/src/pspinlock-sync.c
@@ -0,0 +1,83 @@
+/*
+ * The MIT License
+ *
+ * Copyright (C) 2016 Alexander Saprykin <saprykin.spb@gmail.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * 'Software'), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "pmem.h"
+#include "pspinlock.h"
+
+struct PSpinLock_ {
+	volatile pint spin;
+};
+
+P_LIB_API PSpinLock *
+p_spinlock_new (void)
+{
+	PSpinLock *ret;
+
+	if (P_UNLIKELY ((ret = p_malloc0 (sizeof (PSpinLock))) == NULL)) {
+		P_ERROR ("PSpinLock::p_spinlock_new: failed to allocate memory");
+		return NULL;
+	}
+
+	return ret;
+}
+
+P_LIB_API pboolean
+p_spinlock_lock (PSpinLock *spinlock)
+{
+	if (P_UNLIKELY (spinlock == NULL))
+		return FALSE;
+
+	while ((pboolean) __sync_bool_compare_and_swap (&(spinlock->spin), 0, 1) == FALSE)
+		;
+
+	return TRUE;
+}
+
+P_LIB_API pboolean
+p_spinlock_trylock (PSpinLock *spinlock)
+{
+	if (P_UNLIKELY (spinlock == NULL))
+		return FALSE;
+
+	return (pboolean) __sync_bool_compare_and_swap (&(spinlock->spin), 0, 1);
+}
+
+P_LIB_API pboolean
+p_spinlock_unlock (PSpinLock *spinlock)
+{
+	if (P_UNLIKELY (spinlock == NULL))
+		return FALSE;
+
+	spinlock->spin = 0;
+	__sync_synchronize ();
+
+	return TRUE;
+}
+
+P_LIB_API void
+p_spinlock_free (PSpinLock *spinlock)
+{
+	p_free (spinlock);
+}
-- 
cgit v1.2.1