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
PthreadCancel(pthread_t)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
getline_(fstream & fs,std::string & line)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
~DynLib()66 DynLib::~DynLib() {
67 Close();
68 }
69
Open(const char * lib_name)70 bool DynLib::Open(const char *lib_name) {
71 Close();
72 lib_ = ::dlopen(lib_name, RTLD_NOW);
73
74 return (lib_ != NULL);
75 }
76
Sym(const char * func_name,void ** func_ptr)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
Close()87 void DynLib::Close() {
88 if (lib_) {
89 ::dlclose(lib_);
90 lib_ = NULL;
91 }
92 }
93
94 } // namespace sdm
95
96