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