socket_server/helpers.cpp at master · PIesy/socket_server · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
#include "helpers.h"
#include <fstream>
#ifdef _WIN32
#include <Windows.h>
#endif
#ifdef __unix__
#include <unistd.h>
#include <spawn.h>
#include <sys/wait.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <fcntl.h>
#endif

#ifdef __unix__
extern char **environ;
#endif

namespace helpers
{

#ifdef _WIN32
    void preallocateFile(const std::string & file, size_t size)
    {
        //HANDLE f = CreateFileA(file.c_str(), GENERIC_READ | GENERIC_WRITE, 0, nullptr, CREATE_NEW, FILE_ATTRIBUTE_NORMAL, nullptr);
        //
        //SetFilePointer(f, size, nullptr, FILE_BEGIN);
        //SetEndOfFile(f);
        //CloseHandle(f);
        std::string cmdString = "fsutil file createnew " + file + " " + std::to_string(size);
        system(cmdString.c_str());
    }

    int getMaxSocketDescriptor(const std::vector<Socket*>& sockets)
    {
        return 0;
    }

    ProcessDescripor createProcess(const std::string& executable, std::vector<std::string> args)
    {
        ProcessDescripor desc;
        std::string arguments;
        memset(&desc.process, 0, sizeof(desc.process));
        memset(&desc.si, 0, sizeof(desc.si));
        char buff[30] = { 0 };

        desc.si.cb = sizeof(desc.si);
        for (std::string& arg : args)
            arguments.append(arg + " ");
        memcpy(buff, arguments.c_str(), arguments.length());
        CreateProcessA(executable.c_str(), buff, nullptr, nullptr, TRUE, 0, nullptr, nullptr, &desc.si, &desc.process);
        return desc;
    }

    void waitProcess(ProcessDescripor& descriptor)
    {
        WaitForSingleObject(descriptor.process.hProcess, INFINITE);
        CloseHandle(descriptor.process.hProcess);
        CloseHandle(descriptor.process.hThread);
    }

    SharedMemoryDescriptor createSharedMemory(size_t size, const std::string& name)
    {
        SharedMemoryDescriptor result;

        result.name = name;
        result.size = size;
        result.handle = CreateFileMapping(INVALID_HANDLE_VALUE, nullptr, PAGE_READWRITE, 0, size, name.c_str());
        result.memory = MapViewOfFile(result.handle, FILE_MAP_ALL_ACCESS, 0, 0, size);
        return result;
    }

    SharedMemoryDescriptor openSharedMemory(size_t size, const std::string& name)
    {
        SharedMemoryDescriptor result;

        result.name = name;
        result.size = size;
        result.handle = OpenFileMappingA(FILE_MAP_ALL_ACCESS, FALSE, name.c_str());
        result.memory = MapViewOfFile(result.handle, FILE_MAP_ALL_ACCESS, 0, 0, size);
        return result;
    }

    void removeSharedMemory(SharedMemoryDescriptor& desc)
    {
        UnmapViewOfFile(desc.memory);
        CloseHandle(desc.handle);
    }
#endif
#ifdef __unix__
    void preallocateFile(const std::string & file, size_t size)
    {
        int f = open64(file.c_str(), O_CREAT | O_TRUNC | O_RDWR, S_IRWXU | S_IRGRP | S_IROTH);

        fallocate64(f, 0, 0, size);
        close(f);
    }

    int getMaxSocketDescriptor(const std::vector<Socket*>& sockets)
    {
        int maxVal = -1;

        for (const Socket* sock: sockets)
            if (sock->getSocket().socket > maxVal)
                maxVal = sock->getSocket().socket;
        return maxVal;
    }

    ProcessDescripor createProcess(const std::string& executable, std::vector<std::string> args)
    {
        ProcessDescripor desc;
        char** arguments;
        arguments = new char*[args.size() + 1]();
        for (size_t i = 0; i < args.size(); i++)
        {
            arguments[i] = new char[args[i].length() + 1]();
            memcpy(arguments[i], args[i].c_str(), args[i].length());
        }

        posix_spawn(&desc.process, executable.c_str(), nullptr, nullptr, arguments, environ);
        return desc;
    }

    void waitProcess(ProcessDescripor& descriptor)
    {
        int status;

        waitpid(descriptor.process, &status, 0);
    }

    SharedMemoryDescriptor createSharedMemory(size_t size, const std::string& name)
    {
        SharedMemoryDescriptor result;

        result.name = name;
        result.size = size;
        result.handle = shm_open(name.c_str(), O_CREAT | O_RDWR | O_TRUNC, S_IRWXU | S_IRGRP | S_IROTH);
        ftruncate(result.handle, size);
        result.memory = mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_SHARED, result.handle, 0);
        return result;
    }

    SharedMemoryDescriptor openSharedMemory(size_t size, const std::string& name)
    {
        SharedMemoryDescriptor result;

        result.name = name;
        result.size = size;
        result.handle = shm_open(name.c_str(), O_RDWR, 0);
        result.memory = mmap(nullptr, size, PROT_READ, MAP_SHARED, result.handle, 0);
        return result;
    }

    void removeSharedMemory(SharedMemoryDescriptor& desc)
    {
        shm_unlink(desc.name.c_str());
        munmap(desc.memory, desc.size);
    }

#endif

}