diff options
Diffstat (limited to 'drivers/unix/shared_mem_access_posix.cpp')
| -rw-r--r-- | drivers/unix/shared_mem_access_posix.cpp | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/drivers/unix/shared_mem_access_posix.cpp b/drivers/unix/shared_mem_access_posix.cpp deleted file mode 100644 index f50e177a8b..0000000000 --- a/drivers/unix/shared_mem_access_posix.cpp +++ /dev/null @@ -1,184 +0,0 @@ -/*************************************************************************/ -/* shared_mem_access_posix.cpp */ -/*************************************************************************/ -/* This file is part of: */ -/* GODOT ENGINE */ -/* https://godotengine.org */ -/*************************************************************************/ -/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */ -/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */ -/* */ -/* 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 "shared_mem_access_posix.h" - -#if defined(UNIX_ENABLED) - -//#include "core/os/memory.h" -#include <sys/mman.h> -#include <sys/stat.h> -#include <unistd.h> -//#include <stdio.h> -#include <fcntl.h> -//#include <sys/mman.h> -//#include <sys/stat.h> - -SharedMemAccess *SharedMemAccessPosix::create_func_posix(const String &p_name) { - - return memnew(SharedMemAccessPosix(p_name)); -} - -void SharedMemAccessPosix::make_default() { - - create_func = create_func_posix; -} - -Error SharedMemAccessPosix::open() { - - ERR_EXPLAIN("Already open."); - ERR_FAIL_COND_V(fd != -1, ERR_ALREADY_IN_USE); - - fd = shm_open(("/" + name).utf8().get_data(), O_CREAT | O_RDWR, 0600); - if (fd == -1) { - ERR_EXPLAIN("Cannot create/open."); - ERR_FAIL_V(ERR_CANT_OPEN); - } - - return OK; -} - -Error SharedMemAccessPosix::close() { - - ERR_EXPLAIN("Not open."); - ERR_FAIL_COND_V(!is_open(), ERR_UNCONFIGURED); - - if (!lock()) { - ERR_EXPLAIN("Cannot lock."); - ERR_FAIL_V(ERR_BUSY); - } - - if (is_allocator) { - shm_unlink(("/" + name).utf8().get_data()); - is_allocator = false; - } - - ::close(fd); - fd = -1; - - unlock(); - - return OK; -} - -_FORCE_INLINE_ bool SharedMemAccessPosix::is_open() { - - return fd != -1; -} - -void *SharedMemAccessPosix::lock() { - - ERR_EXPLAIN("Not open."); - ERR_FAIL_COND_V(!is_open(), NULL); - - ERR_EXPLAIN("Lock already held."); - ERR_FAIL_COND_V(is_locking(), NULL); - - size = lseek(fd, 0, SEEK_END); - - lock_addr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); - if (lock_addr == MAP_FAILED) { - ERR_EXPLAIN("Cannot map memory."); - ERR_FAIL_V(NULL); - } - - return lock_addr; -} - -void SharedMemAccessPosix::unlock() { - - ERR_EXPLAIN("Lock not held."); - ERR_FAIL_COND(!is_locking()); - - munmap(lock_addr, size); - lock_addr = NULL; - size = 0; -} - -_FORCE_INLINE_ bool SharedMemAccessPosix::is_locking() { - - return lock_addr; -} - -void *SharedMemAccessPosix::set_size(uint64_t p_size) { - - ERR_EXPLAIN("Lock must be held to set the size."); - ERR_FAIL_COND_V(!is_locking(), NULL); - - if (ftruncate(fd, p_size) == -1) { - ERR_EXPLAIN("Cannot set new size. (Out of memory?)"); - ERR_FAIL_V(NULL); - } - - munmap(lock_addr, size); - - // Try to remap at former address - lock_addr = mmap(lock_addr, p_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); - if (lock_addr == MAP_FAILED) { - unlock(); - - ERR_EXPLAIN("Cannot remap memory. Lock released."); - ERR_FAIL_V(NULL); - } - - return lock_addr; -} - -uint64_t SharedMemAccessPosix::get_size() { - - ERR_EXPLAIN("Lock must be held to get the size."); - ERR_FAIL_COND_V(!is_locking(), 0); - - return size; -} - -SharedMemAccessPosix::SharedMemAccessPosix(const String &p_name) : - name(p_name), - is_allocator(false), - size(0), - fd(-1), - lock_addr(NULL) { -} - -SharedMemAccessPosix::~SharedMemAccessPosix() { - - if (is_open()) { - - if (is_locking()) { - unlock(); - } - - if (close() != OK && is_allocator) { - ERR_PRINTS("Leaking shared memory '" + name + "'."); - } - } -} - -#endif |