1 files changed, 272 insertions, 0 deletions
diff --git a/3rdparty/plibsys/src/psemaphore-posix.c b/3rdparty/plibsys/src/psemaphore-posix.c
new file mode 100644
index 0000000..f98a045
--- /dev/null
+++ b/3rdparty/plibsys/src/psemaphore-posix.c
@@ -0,0 +1,272 @@
+/*
+ * The MIT License
+ *
+ * Copyright (C) 2010-2018 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 "perror.h"
+#include "pmem.h"
+#include "psemaphore.h"
+#include "perror-private.h"
+#include "pipc-private.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <semaphore.h>
+#include <errno.h>
+
+#define P_SEM_SUFFIX		"_p_sem_object"
+
+typedef sem_t psem_hdl;
+
+/* On some HP-UX versions it may not be defined */
+#ifndef SEM_FAILED
+#  define SEM_FAILED ((sem_t *) -1)
+#endif
+
+#ifdef P_OS_SOLARIS
+#  define P_SEM_INVALID_HDL	(sem_t *) -1
+#else
+#  define P_SEM_INVALID_HDL	SEM_FAILED
+#endif
+
+struct PSemaphore_ {
+	pboolean		sem_created;
+	pchar			*platform_key;
+#if defined (P_OS_VMS) && (PLIBSYS_SIZEOF_VOID_P == 4)
+#  pragma __pointer_size 64
+#endif
+	psem_hdl		*sem_hdl;
+#if defined (P_OS_VMS) && (PLIBSYS_SIZEOF_VOID_P == 4)
+#  pragma __pointer_size 32
+#endif
+	PSemaphoreAccessMode	mode;
+	pint			init_val;
+};
+
+static pboolean pp_semaphore_create_handle (PSemaphore *sem, PError **error);
+static void pp_semaphore_clean_handle (PSemaphore *sem);
+
+static pboolean
+pp_semaphore_create_handle (PSemaphore	*sem,
+			    PError	**error)
+{
+	pint init_val;
+
+	if (P_UNLIKELY (sem == NULL || sem->platform_key == NULL)) {
+		p_error_set_error_p (error,
+				     (pint) P_ERROR_IPC_INVALID_ARGUMENT,
+				     0,
+				     "Invalid input argument");
+		return FALSE;
+	}
+
+	init_val = sem->init_val;
+
+	/* Solaris may interrupt sem_open() call */
+	while ((sem->sem_hdl = sem_open (sem->platform_key,
+					 O_CREAT | O_EXCL,
+					 0660,
+					 init_val)) == P_SEM_INVALID_HDL &&
+		p_error_get_last_system () == EINTR)
+	;
+
+	if (sem->sem_hdl == P_SEM_INVALID_HDL) {
+		if (p_error_get_last_system () == EEXIST) {
+			if (sem->mode == P_SEM_ACCESS_CREATE)
+				sem_unlink (sem->platform_key);
+			else
+				init_val = 0;
+
+			while ((sem->sem_hdl = sem_open (sem->platform_key,
+							 0,
+							 0,
+							 init_val)) == P_SEM_INVALID_HDL &&
+				p_error_get_last_system () == EINTR)
+			;
+		}
+	} else
+		sem->sem_created = TRUE;
+
+	if (P_UNLIKELY (sem->sem_hdl == P_SEM_INVALID_HDL)) {
+		p_error_set_error_p (error,
+				     (pint) p_error_get_last_ipc (),
+				     p_error_get_last_system (),
+				     "Failed to call sem_open() to create semaphore");
+		pp_semaphore_clean_handle (sem);
+		return FALSE;
+	}
+
+	return TRUE;
+}
+
+static void
+pp_semaphore_clean_handle (PSemaphore *sem)
+{
+	if (P_UNLIKELY (sem->sem_hdl != P_SEM_INVALID_HDL &&
+			sem_close (sem->sem_hdl) == -1))
+		P_ERROR ("PSemaphore::pp_semaphore_clean_handle: sem_close() failed");
+
+	if (sem->sem_hdl != P_SEM_INVALID_HDL &&
+	    sem->sem_created == TRUE &&
+	    sem_unlink (sem->platform_key) == -1)
+		P_ERROR ("PSemaphore::pp_semaphore_clean_handle: sem_unlink() failed");
+
+	sem->sem_created = FALSE;
+	sem->sem_hdl = P_SEM_INVALID_HDL;
+}
+
+P_LIB_API PSemaphore *
+p_semaphore_new (const pchar		*name,
+		 pint			init_val,
+		 PSemaphoreAccessMode	mode,
+		 PError			**error)
+{
+	PSemaphore	*ret;
+	pchar		*new_name;
+
+	if (P_UNLIKELY (name == NULL || init_val < 0)) {
+		p_error_set_error_p (error,
+				     (pint) P_ERROR_IPC_INVALID_ARGUMENT,
+				     0,
+				     "Invalid input argument");
+		return NULL;
+	}
+
+	if (P_UNLIKELY ((ret = p_malloc0 (sizeof (PSemaphore))) == NULL)) {
+		p_error_set_error_p (error,
+				     (pint) P_ERROR_IPC_NO_RESOURCES,
+				     0,
+				     "Failed to allocate memory for semaphore");
+		return NULL;
+	}
+
+	if (P_UNLIKELY ((new_name = p_malloc0 (strlen (name) + strlen (P_SEM_SUFFIX) + 1)) == NULL)) {
+		p_error_set_error_p (error,
+				     (pint) P_ERROR_IPC_NO_RESOURCES,
+				     0,
+				     "Failed to allocate memory for semaphore");
+		p_free (ret);
+		return NULL;
+	}
+
+	strcpy (new_name, name);
+	strcat (new_name, P_SEM_SUFFIX);
+
+#if defined (P_OS_IRIX) || defined (P_OS_TRU64)
+	/* IRIX and Tru64 prefer filename styled IPC names */
+	ret->platform_key = p_ipc_get_platform_key (new_name, FALSE);
+#else
+	ret->platform_key = p_ipc_get_platform_key (new_name, TRUE);
+#endif
+	ret->init_val = init_val;
+	ret->mode = mode;
+
+	p_free (new_name);
+
+	if (P_UNLIKELY (pp_semaphore_create_handle (ret, error) == FALSE)) {
+		p_semaphore_free (ret);
+		return NULL;
+	}
+
+	return ret;
+}
+
+P_LIB_API void
+p_semaphore_take_ownership (PSemaphore *sem)
+{
+	if (P_UNLIKELY (sem == NULL))
+		return;
+
+	sem->sem_created = TRUE;
+}
+
+P_LIB_API pboolean
+p_semaphore_acquire (PSemaphore	*sem,
+		     PError	**error)
+{
+	pboolean	ret;
+	pint		res;
+
+	if (P_UNLIKELY (sem == NULL)) {
+		p_error_set_error_p (error,
+				     (pint) P_ERROR_IPC_INVALID_ARGUMENT,
+				     0,
+				     "Invalid input argument");
+		return FALSE;
+	}
+
+	while ((res = sem_wait (sem->sem_hdl)) == -1 && p_error_get_last_system () == EINTR)
+		;
+
+	ret = (res == 0);
+
+	if (P_UNLIKELY (ret == FALSE))
+		p_error_set_error_p (error,
+				     (pint) p_error_get_last_ipc (),
+				     p_error_get_last_system (),
+				     "Failed to call sem_wait() on semaphore");
+
+	return ret;
+}
+
+P_LIB_API pboolean
+p_semaphore_release (PSemaphore	*sem,
+		     PError	**error)
+{
+	pboolean ret;
+
+	if (P_UNLIKELY (sem == NULL)) {
+		p_error_set_error_p (error,
+				     (pint) P_ERROR_IPC_INVALID_ARGUMENT,
+				     0,
+				     "Invalid input argument");
+		return FALSE;
+	}
+
+	ret = (sem_post (sem->sem_hdl) == 0);
+
+	if (P_UNLIKELY (ret == FALSE))
+		p_error_set_error_p (error,
+				     (pint) p_error_get_last_ipc (),
+				     p_error_get_last_system (),
+				     "Failed to call sem_post() on semaphore");
+
+	return ret;
+}
+
+P_LIB_API void
+p_semaphore_free (PSemaphore *sem)
+{
+	if (P_UNLIKELY (sem == NULL))
+		return;
+
+	pp_semaphore_clean_handle (sem);
+
+	if (P_LIKELY (sem->platform_key != NULL))
+		p_free (sem->platform_key);
+
+	p_free (sem);
+}