add plibsys

1 files changed, 312 insertions, 0 deletions

diff --git a/3rdparty/plibsys/src/pcondvariable-win.c b/3rdparty/plibsys/src/pcondvariable-win.c
new file mode 100644
index 0000000..0cf7dcb
--- /dev/null
+++ b/3rdparty/plibsys/src/pcondvariable-win.c
@@ -0,0 +1,312 @@
+/*
+ * The MIT License
+ *
+ * Copyright (C) 2010-2017 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.
+ */
+
+/* Taken from "Strategies for Implementing POSIX Condition Variables on Win32"
+ * by Douglas C. Schmidt and Irfan Pyarali.
+ * See: http://www.cse.wustl.edu/~schmidt/win32-cv-1.html
+ * See: https://github.com/python/cpython/blob/master/Python/condvar.h
+ */
+
+#include "patomic.h"
+#include "pmem.h"
+#include "pcondvariable.h"
+
+#include <stdlib.h>
+
+typedef VOID (WINAPI * InitializeConditionVariableFunc) (ppointer cv);
+typedef BOOL (WINAPI * SleepConditionVariableCSFunc)    (ppointer cv, PCRITICAL_SECTION cs, DWORD ms);
+typedef VOID (WINAPI * WakeConditionVariableFunc)       (ppointer cv);
+typedef VOID (WINAPI * WakeAllConditionVariableFunc)    (ppointer cv);
+
+typedef pboolean (* PWin32CondInit)    (PCondVariable *cond);
+typedef void     (* PWin32CondClose)   (PCondVariable *cond);
+typedef pboolean (* PWin32CondWait)    (PCondVariable *cond, PMutex *mutex);
+typedef pboolean (* PWin32CondSignal)  (PCondVariable *cond);
+typedef pboolean (* PWin32CondBrdcast) (PCondVariable *cond);
+
+static PWin32CondInit    pp_cond_variable_init_func    = NULL;
+static PWin32CondClose   pp_cond_variable_close_func   = NULL;
+static PWin32CondWait    pp_cond_variable_wait_func    = NULL;
+static PWin32CondSignal  pp_cond_variable_signal_func  = NULL;
+static PWin32CondBrdcast pp_cond_variable_brdcast_func = NULL;
+
+typedef struct PCondVariableVistaTable_ {
+	InitializeConditionVariableFunc	cv_init;
+	SleepConditionVariableCSFunc	cv_wait;
+	WakeConditionVariableFunc	cv_wake;
+	WakeAllConditionVariableFunc	cv_brdcast;
+} PCondVariableVistaTable;
+
+typedef struct PCondVariableXP_ {
+	HANDLE	waiters_sema;
+	pint	waiters_count;
+} PCondVariableXP;
+
+struct PCondVariable_ {
+	ppointer cv;
+};
+
+static PCondVariableVistaTable pp_cond_variable_vista_table = {NULL, NULL, NULL, NULL};
+
+/* CONDITION_VARIABLE routines */
+static pboolean pp_cond_variable_init_vista (PCondVariable *cond);
+static void pp_cond_variable_close_vista (PCondVariable *cond);
+static pboolean pp_cond_variable_wait_vista (PCondVariable *cond, PMutex *mutex);
+static pboolean pp_cond_variable_signal_vista (PCondVariable *cond);
+static pboolean pp_cond_variable_broadcast_vista (PCondVariable *cond);
+
+/* Windows XP emulation routines */
+static pboolean pp_cond_variable_init_xp (PCondVariable *cond);
+static void pp_cond_variable_close_xp (PCondVariable *cond);
+static pboolean pp_cond_variable_wait_xp (PCondVariable *cond, PMutex *mutex);
+static pboolean pp_cond_variable_signal_xp (PCondVariable *cond);
+static pboolean pp_cond_variable_broadcast_xp (PCondVariable *cond);
+
+/* CONDITION_VARIABLE routines */
+
+static pboolean
+pp_cond_variable_init_vista (PCondVariable *cond)
+{
+	pp_cond_variable_vista_table.cv_init (cond);
+
+	return TRUE;
+}
+
+static void
+pp_cond_variable_close_vista (PCondVariable *cond)
+{
+	P_UNUSED (cond);
+}
+
+static pboolean
+pp_cond_variable_wait_vista (PCondVariable *cond, PMutex *mutex)
+{
+	return pp_cond_variable_vista_table.cv_wait (cond,
+						     (PCRITICAL_SECTION) mutex,
+						     INFINITE) != 0 ? TRUE : FALSE;
+}
+
+static pboolean
+pp_cond_variable_signal_vista (PCondVariable *cond)
+{
+	pp_cond_variable_vista_table.cv_wake (cond);
+
+	return TRUE;
+}
+
+static pboolean
+pp_cond_variable_broadcast_vista (PCondVariable *cond)
+{
+	pp_cond_variable_vista_table.cv_brdcast (cond);
+
+	return TRUE;
+}
+
+/* Windows XP emulation routines */
+
+static pboolean
+pp_cond_variable_init_xp (PCondVariable *cond)
+{
+	PCondVariableXP *cv_xp;
+
+	if ((cond->cv = p_malloc0 (sizeof (PCondVariableXP))) == NULL) {
+		P_ERROR ("PCondVariable::pp_cond_variable_init_xp: failed to allocate memory (internal)");
+		return FALSE;
+	}
+
+	cv_xp = ((PCondVariableXP *) cond->cv);
+
+	cv_xp->waiters_count = 0;
+	cv_xp->waiters_sema  = CreateSemaphoreA (NULL, 0, MAXLONG, NULL);
+
+	if (P_UNLIKELY (cv_xp->waiters_sema == NULL)) {
+		P_ERROR ("PCondVariable::pp_cond_variable_init_xp: failed to initialize semaphore");
+		p_free (cond->cv);
+		cond->cv = NULL;
+		return FALSE;
+	}
+
+	return TRUE;
+}
+
+static void
+pp_cond_variable_close_xp (PCondVariable *cond)
+{
+	CloseHandle (((PCondVariableXP *) cond->cv)->waiters_sema);
+	p_free (cond->cv);
+}
+
+static pboolean
+pp_cond_variable_wait_xp (PCondVariable *cond, PMutex *mutex)
+{
+	PCondVariableXP	*cv_xp = ((PCondVariableXP *) cond->cv);
+	DWORD		wait;
+
+	p_atomic_int_inc (&cv_xp->waiters_count);
+
+	p_mutex_unlock (mutex);
+	wait = WaitForSingleObjectEx (cv_xp->waiters_sema, INFINITE, FALSE);
+	p_mutex_lock (mutex);
+
+	if (wait != WAIT_OBJECT_0)
+		p_atomic_int_add (&cv_xp->waiters_count, -1);
+
+	return wait == WAIT_OBJECT_0 ? TRUE : FALSE;
+}
+
+static pboolean
+pp_cond_variable_signal_xp (PCondVariable *cond)
+{
+	PCondVariableXP *cv_xp = ((PCondVariableXP *) cond->cv);
+
+	if (p_atomic_int_get (&cv_xp->waiters_count) > 0) {
+		p_atomic_int_add (&cv_xp->waiters_count, -1);
+		return ReleaseSemaphore (cv_xp->waiters_sema, 1, 0) != 0 ? TRUE : FALSE;
+	}
+
+	return TRUE;
+}
+
+static pboolean
+pp_cond_variable_broadcast_xp (PCondVariable *cond)
+{
+	PCondVariableXP	*cv_xp = ((PCondVariableXP *) cond->cv);
+	pint		waiters;
+
+	waiters = p_atomic_int_get (&cv_xp->waiters_count);
+
+	if (waiters > 0) {
+		p_atomic_int_set (&cv_xp->waiters_count, 0);
+		return ReleaseSemaphore (cv_xp->waiters_sema, waiters, 0) != 0 ? TRUE : FALSE;
+	}
+
+	return TRUE;
+}
+
+P_LIB_API PCondVariable *
+p_cond_variable_new (void)
+{
+	PCondVariable *ret;
+
+	if (P_UNLIKELY ((ret = p_malloc0 (sizeof (PCondVariable))) == NULL)) {
+		P_ERROR ("PCondVariable::p_cond_variable_new: failed to allocate memory");
+		return NULL;
+	}
+
+	if (P_UNLIKELY (pp_cond_variable_init_func (ret) != TRUE)) {
+		P_ERROR ("PCondVariable::p_cond_variable_new: failed to initialize");
+		p_free (ret);
+		return NULL;
+	}
+
+	return ret;
+}
+
+P_LIB_API void
+p_cond_variable_free (PCondVariable *cond)
+{
+	if (P_UNLIKELY (cond == NULL))
+		return;
+
+	pp_cond_variable_close_func (cond);
+	p_free (cond);
+}
+
+P_LIB_API pboolean
+p_cond_variable_wait (PCondVariable	*cond,
+		      PMutex		*mutex)
+{
+	if (P_UNLIKELY (cond == NULL || mutex == NULL))
+		return FALSE;
+
+	return pp_cond_variable_wait_func (cond, mutex);
+}
+
+P_LIB_API pboolean
+p_cond_variable_signal (PCondVariable *cond)
+{
+	if (P_UNLIKELY (cond == NULL))
+		return FALSE;
+
+	return pp_cond_variable_signal_func (cond);
+}
+
+P_LIB_API pboolean
+p_cond_variable_broadcast (PCondVariable *cond)
+{
+	if (P_UNLIKELY (cond == NULL))
+		return FALSE;
+
+	return pp_cond_variable_brdcast_func (cond);
+}
+
+void
+p_cond_variable_init (void)
+{
+	HMODULE hmodule;
+
+	hmodule = GetModuleHandleA ("kernel32.dll");
+
+	if (P_UNLIKELY (hmodule == NULL)) {
+		P_ERROR ("PCondVariable::p_cond_variable_init: failed to load kernel32.dll module");
+		return;
+	}
+
+	pp_cond_variable_vista_table.cv_init = (InitializeConditionVariableFunc) GetProcAddress (hmodule,
+												 "InitializeConditionVariable");
+
+	if (P_LIKELY (pp_cond_variable_vista_table.cv_init != NULL)) {
+		pp_cond_variable_vista_table.cv_wait    = (SleepConditionVariableCSFunc) GetProcAddress (hmodule,
+													 "SleepConditionVariableCS");
+		pp_cond_variable_vista_table.cv_wake    = (WakeConditionVariableFunc) GetProcAddress (hmodule,
+												      "WakeConditionVariable");
+		pp_cond_variable_vista_table.cv_brdcast = (WakeAllConditionVariableFunc) GetProcAddress (hmodule,
+													 "WakeAllConditionVariable");
+
+		pp_cond_variable_init_func    = pp_cond_variable_init_vista;
+		pp_cond_variable_close_func   = pp_cond_variable_close_vista;
+		pp_cond_variable_wait_func    = pp_cond_variable_wait_vista;
+		pp_cond_variable_signal_func  = pp_cond_variable_signal_vista;
+		pp_cond_variable_brdcast_func = pp_cond_variable_broadcast_vista;
+	} else {
+		pp_cond_variable_init_func    = pp_cond_variable_init_xp;
+		pp_cond_variable_close_func   = pp_cond_variable_close_xp;
+		pp_cond_variable_wait_func    = pp_cond_variable_wait_xp;
+		pp_cond_variable_signal_func  = pp_cond_variable_signal_xp;
+		pp_cond_variable_brdcast_func = pp_cond_variable_broadcast_xp;
+	}
+}
+
+void
+p_cond_variable_shutdown (void)
+{
+	memset (&pp_cond_variable_vista_table, 0, sizeof (pp_cond_variable_vista_table));
+
+	pp_cond_variable_init_func    = NULL;
+	pp_cond_variable_close_func   = NULL;
+	pp_cond_variable_wait_func    = NULL;
+	pp_cond_variable_signal_func  = NULL;
+	pp_cond_variable_brdcast_func = NULL;
+}