Fix inclusion of semaphore.h is hardcoded to glibc non-multiarch - aka rename sempahore.h to sem.h

1 files changed, 186 insertions, 0 deletions

diff --git a/src/sem.cc b/src/sem.cc
new file mode 100644
index 0000000..ad5266d
--- /dev/null
+++ b/src/sem.cc
@@ -0,0 +1,186 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            sem.cc
+ *
+ *  Sat Oct  8 17:44:13 CEST 2005
+ *  Copyright  2005 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  DrumGizmo is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include "sem.h"
+
+#include <hugin.hpp>
+#include <limits>
+#include <assert.h>
+#include <string.h>
+#include <chrono>
+#include <thread>
+
+#include "platform.h"
+
+#if DG_PLATFORM != DG_PLATFORM_WINDOWS
+#include <semaphore.h>
+#include <errno.h>
+#include <stdio.h>
+#include <sys/time.h>
+#endif
+
+#if DG_PLATFORM == DG_PLATFORM_OSX
+//#include <Multiprocessing.h>
+#include <CoreServices/CoreServices.h>
+#endif
+
+struct semaphore_private_t {
+#if DG_PLATFORM == DG_PLATFORM_WINDOWS
+	HANDLE semaphore;
+#elif DG_PLATFORM == DG_PLATFORM_OSX
+	MPSemaphoreID semaphore;
+#else
+	sem_t semaphore;
+#endif
+};
+
+Semaphore::Semaphore(std::size_t initial_count)
+{
+	prv = new struct semaphore_private_t();
+
+#if DG_PLATFORM == DG_PLATFORM_WINDOWS
+	prv->semaphore = CreateSemaphore(nullptr,  // default security attributes
+	                                 initial_count,
+	                                 std::numeric_limits<LONG>::max(),
+	                                 nullptr); // unnamed semaphore
+#elif DG_PLATFORM == DG_PLATFORM_OSX
+	MPCreateSemaphore(std::numeric_limits<std::uint32_t>::max(),
+	                  initial_count,
+	                  &prv->semaphore);
+#else
+	const int pshared = 0;
+	memset(&prv->semaphore, 0, sizeof(sem_t));
+	sem_init(&prv->semaphore, pshared, initial_count);
+#endif
+}
+
+Semaphore::~Semaphore()
+{
+#if DG_PLATFORM == DG_PLATFORM_WINDOWS
+	CloseHandle(prv->semaphore);
+#elif DG_PLATFORM == DG_PLATFORM_OSX
+	MPDeleteSemaphore(prv->semaphore);
+#else
+	sem_destroy(&prv->semaphore);
+#endif
+
+	delete prv;
+}
+
+void Semaphore::post()
+{
+#if DG_PLATFORM == DG_PLATFORM_WINDOWS
+	ReleaseSemaphore(prv->semaphore, 1, nullptr);
+#elif DG_PLATFORM == DG_PLATFORM_OSX
+	MPSignalSemaphore(prv->semaphore);
+#else
+	sem_post(&prv->semaphore);
+#endif
+}
+
+bool Semaphore::wait(const std::chrono::milliseconds& timeout)
+{
+#if DG_PLATFORM == DG_PLATFORM_WINDOWS
+	DWORD ret = WaitForSingleObject(prv->semaphore, timeout.count());
+	if(ret == WAIT_TIMEOUT)
+	{
+		return false;
+	}
+
+	assert(ret == WAIT_OBJECT_0);
+#elif DG_PLATFORM == DG_PLATFORM_OSX
+	auto ret = MPWaitOnSemaphore(prv->semaphore,
+	                             kDurationMillisecond * timeout.count());
+	if(ret == kMPTimeoutErr)
+	{
+		return false;
+	}
+#else
+	struct timespec ts;
+	clock_gettime(CLOCK_REALTIME, &ts);
+
+	// Add timeout
+	time_t seconds = (time_t)(timeout.count() / 1000);
+	ts.tv_sec += seconds;
+	ts.tv_nsec += (long)((timeout.count() % 1000) * 1000000);
+
+	// Make sure we don't overflow the nanoseconds.
+	constexpr long nsec = 1000000000LL;
+	if(ts.tv_nsec >= nsec)
+	{
+		ts.tv_nsec -= nsec;
+		ts.tv_sec += 1;
+	}
+
+again:
+	int ret = sem_timedwait(&prv->semaphore, &ts);
+	if(ret < 0)
+	{
+		if(errno == EINTR)
+		{
+			// The timed wait were interrupted prematurely so we need to wait some
+			// more. To prevent an infinite loop-like behaviour we make a short sleep.
+			std::this_thread::sleep_for(std::chrono::milliseconds(1));
+			goto again;
+		}
+
+		if(errno == ETIMEDOUT)
+		{
+			return false;
+		}
+
+		perror("sem_timedwait()");
+		assert(false);
+	}
+#endif
+
+	return true;
+}
+
+void Semaphore::wait()
+{
+#if DG_PLATFORM == DG_PLATFORM_WINDOWS
+	WaitForSingleObject(prv->semaphore, INFINITE);
+#elif DG_PLATFORM == DG_PLATFORM_OSX
+	MPWaitOnSemaphore(prv->semaphore, kDurationForever);
+#else
+again:
+	int ret = sem_wait(&prv->semaphore);
+	if(ret < 0)
+	{
+		if(errno == EINTR)
+		{
+			// The wait were interrupted prematurely so we need to wait again
+			// To prevent an infinite loop-like behaviour we make a short sleep.
+			std::this_thread::sleep_for(std::chrono::milliseconds(1));
+			goto again;
+		}
+
+		perror("sem_wait()");
+		assert(false);
+	}
+#endif
+}