add plibsys

1 files changed, 103 insertions, 0 deletions

diff --git a/3rdparty/plibsys/src/pspinlock-c11.c b/3rdparty/plibsys/src/pspinlock-c11.c
new file mode 100644
index 0000000..1e77954
--- /dev/null
+++ b/3rdparty/plibsys/src/pspinlock-c11.c
@@ -0,0 +1,103 @@
+/*
+ * 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"
+
+#ifdef P_CC_SUN
+#  define PSPINLOCK_INT_CAST(x) (pint *) (x)
+#else
+#  define PSPINLOCK_INT_CAST(x) x
+#endif
+
+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)
+{
+	pint tmp_int;
+
+	if (P_UNLIKELY (spinlock == NULL))
+		return FALSE;
+
+	do {
+		tmp_int = 0;
+	} while ((pboolean) __atomic_compare_exchange_n (PSPINLOCK_INT_CAST (&(spinlock->spin)),
+							 &tmp_int,
+							 1,
+							 0,
+							 __ATOMIC_ACQUIRE,
+							 __ATOMIC_RELAXED) == FALSE);
+
+	return TRUE;
+}
+
+P_LIB_API pboolean
+p_spinlock_trylock (PSpinLock *spinlock)
+{
+	pint tmp_int = 0;
+
+	if (P_UNLIKELY (spinlock == NULL))
+		return FALSE;
+
+	return (pboolean) __atomic_compare_exchange_n (PSPINLOCK_INT_CAST (&(spinlock->spin)),
+						       &tmp_int,
+						       1,
+						       0,
+						       __ATOMIC_ACQUIRE,
+						       __ATOMIC_RELAXED);
+}
+
+P_LIB_API pboolean
+p_spinlock_unlock (PSpinLock *spinlock)
+{
+	if (P_UNLIKELY (spinlock == NULL))
+		return FALSE;
+
+	__atomic_store_4 (PSPINLOCK_INT_CAST (&(spinlock->spin)), 0, __ATOMIC_RELEASE);
+
+	return TRUE;
+}
+
+P_LIB_API void
+p_spinlock_free (PSpinLock *spinlock)
+{
+	p_free (spinlock);
+}