| /* |
| * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * - Neither the name of Oracle nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef LIBJIMAGE_OSSUPPORT_HPP |
| #define LIBJIMAGE_OSSUPPORT_HPP |
| |
| #ifdef WIN32 |
| #include <Windows.h> |
| #else |
| #include <pthread.h> |
| #endif |
| |
| class osSupport { |
| public: |
| /** |
| * Open a regular file read-only. |
| * Return the file descriptor. |
| */ |
| static jint openReadOnly(const char *path); |
| |
| /** |
| * Close a file descriptor. |
| */ |
| static jint close(jint fd); |
| |
| /** |
| * Return the size of a regular file. |
| */ |
| static jlong size(const char *path); |
| |
| /** |
| * Read nBytes at offset into a buffer. |
| */ |
| static jlong read(jint fd, char *buf, jlong nBytes, jlong offset); |
| |
| /** |
| * Map nBytes at offset into memory and return the address. |
| * The system chooses the address. |
| */ |
| static void* map_memory(jint fd, const char *filename, size_t file_offset, size_t bytes); |
| |
| /** |
| * Unmap nBytes of memory at address. |
| */ |
| static int unmap_memory(void* addr, size_t bytes); |
| }; |
| |
| /** |
| * A CriticalSection to protect a small section of code. |
| */ |
| class SimpleCriticalSection { |
| friend class SimpleCriticalSectionLock; |
| private: |
| void enter(); |
| void exit(); |
| public: |
| SimpleCriticalSection(); |
| //~SimpleCriticalSection(); // Cretes a dependency on Solaris on a C++ exit registration |
| |
| private: |
| #ifdef WIN32 |
| CRITICAL_SECTION critical_section; |
| #else |
| pthread_mutex_t mutex; |
| #endif // WIN32 |
| }; |
| |
| /** |
| * SimpleCriticalSectionLock instance. |
| * The constructor locks a SimpleCriticalSection and the |
| * destructor does the unlock. |
| */ |
| class SimpleCriticalSectionLock { |
| private: |
| SimpleCriticalSection *lock; |
| public: |
| |
| SimpleCriticalSectionLock(SimpleCriticalSection *cslock) { |
| this->lock = cslock; |
| lock->enter(); |
| } |
| |
| ~SimpleCriticalSectionLock() { |
| lock->exit(); |
| } |
| }; |
| |
| #endif // LIBJIMAGE_OSSUPPORT_HPP |