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/pmutex-os2.c | 112 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 112 insertions(+)
 create mode 100644 3rdparty/plibsys/src/pmutex-os2.c

(limited to '3rdparty/plibsys/src/pmutex-os2.c')

diff --git a/3rdparty/plibsys/src/pmutex-os2.c b/3rdparty/plibsys/src/pmutex-os2.c
new file mode 100644
index 0000000..1040044
--- /dev/null
+++ b/3rdparty/plibsys/src/pmutex-os2.c
@@ -0,0 +1,112 @@
+/*
+ * The MIT License
+ *
+ * Copyright (C) 2017 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 "pmutex.h"
+
+#include <stdlib.h>
+
+#define INCL_DOSSEMAPHORES
+#define INCL_DOSERRORS
+#include <os2.h>
+
+typedef HMTX mutex_hdl;
+
+struct PMutex_ {
+	mutex_hdl	hdl;
+};
+
+P_LIB_API PMutex *
+p_mutex_new (void)
+{
+	PMutex *ret;
+
+	if (P_UNLIKELY ((ret = p_malloc0 (sizeof (PMutex))) == NULL)) {
+		P_ERROR ("PMutex::p_mutex_new: failed to allocate memory");
+		return NULL;
+	}
+
+	if (P_UNLIKELY (DosCreateMutexSem (NULL, (PHMTX) &ret->hdl, 0, FALSE) != NO_ERROR)) {
+		P_ERROR ("PMutex::p_mutex_new: DosCreateMutexSem() failed");
+		p_free (ret);
+		return NULL;
+	}
+
+	return ret;
+}
+
+P_LIB_API pboolean
+p_mutex_lock (PMutex *mutex)
+{
+	APIRET ulrc;
+
+	if (P_UNLIKELY (mutex == NULL))
+		return FALSE;
+
+	while ((ulrc = DosRequestMutexSem (mutex->hdl, SEM_INDEFINITE_WAIT)) == ERROR_INTERRUPT)
+		;
+
+	if (P_LIKELY (ulrc == NO_ERROR))
+		return TRUE;
+	else {
+		P_ERROR ("PMutex::p_mutex_lock: DosRequestMutexSem() failed");
+		return FALSE;
+	}
+}
+
+P_LIB_API pboolean
+p_mutex_trylock (PMutex *mutex)
+{
+	if (P_UNLIKELY (mutex == NULL))
+		return FALSE;
+
+	return (DosRequestMutexSem (mutex->hdl, SEM_IMMEDIATE_RETURN)) == NO_ERROR ? TRUE : FALSE;
+}
+
+P_LIB_API pboolean
+p_mutex_unlock (PMutex *mutex)
+{
+	if (P_UNLIKELY (mutex == NULL))
+		return FALSE;
+
+	if (P_LIKELY (DosReleaseMutexSem (mutex->hdl) == NO_ERROR))
+		return TRUE;
+	else {
+		P_ERROR ("PMutex::p_mutex_unlock: DosReleaseMutexSem() failed");
+		return FALSE;
+	}
+}
+
+P_LIB_API void
+p_mutex_free (PMutex *mutex)
+{
+	if (P_UNLIKELY (mutex == NULL))
+		return;
+
+	if (P_UNLIKELY (DosCloseMutexSem (mutex->hdl) != NO_ERROR))
+		P_ERROR ("PMutex::p_mutex_free: DosCloseMutexSem() failed");
+
+	p_free (mutex);
+}
-- 
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