1 /* 2 * Copyright (c) 2015, The Linux Foundation. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * * Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * * Redistributions in binary form must reproduce the above 10 * copyright notice, this list of conditions and the following 11 * disclaimer in the documentation and/or other materials provided 12 * with the distribution. 13 * * Neither the name of The Linux Foundation nor the names of its 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS 21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 24 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 26 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN 27 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include <utils/sys.h> 31 #include <sys/ioctl.h> 32 #include <fcntl.h> 33 #include <unistd.h> 34 #include <string> 35 36 #define __CLASS__ "Sys" 37 38 namespace sdm { 39 40 #ifndef SDM_VIRTUAL_DRIVER 41 42 int PthreadCancel(pthread_t /* thread */) { 43 return 0; 44 } 45 46 // Pointer to actual driver interfaces. 47 Sys::ioctl Sys::ioctl_ = ::ioctl; 48 Sys::access Sys::access_ = ::access; 49 Sys::open Sys::open_ = ::open; 50 Sys::close Sys::close_ = ::close; 51 Sys::poll Sys::poll_ = ::poll; 52 Sys::pread Sys::pread_ = ::pread; 53 Sys::pwrite Sys::pwrite_ = ::pwrite; 54 Sys::pthread_cancel Sys::pthread_cancel_ = PthreadCancel; 55 Sys::dup Sys::dup_ = ::dup; 56 Sys::read Sys::read_ = ::read; 57 Sys::write Sys::write_ = ::write; 58 Sys::eventfd Sys::eventfd_ = ::eventfd; 59 60 bool Sys::getline_(fstream &fs, std::string &line) { 61 return std::getline(fs, line) ? true : false; 62 } 63 64 #endif // SDM_VIRTUAL_DRIVER 65 66 DynLib::~DynLib() { 67 Close(); 68 } 69 70 bool DynLib::Open(const char *lib_name) { 71 Close(); 72 lib_ = ::dlopen(lib_name, RTLD_NOW); 73 74 return (lib_ != NULL); 75 } 76 77 bool DynLib::Sym(const char *func_name, void **func_ptr) { 78 if (lib_) { 79 *func_ptr = ::dlsym(lib_, func_name); 80 } else { 81 *func_ptr = NULL; 82 } 83 84 return (*func_ptr != NULL); 85 } 86 87 void DynLib::Close() { 88 if (lib_) { 89 ::dlclose(lib_); 90 lib_ = NULL; 91 } 92 } 93 94 } // namespace sdm 95 96