summaryrefslogtreecommitdiffstats
path: root/src/common/thread.cpp
blob: dc153ba718e4107dda7182b41aa16d960e0c8443 (plain) (blame)
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
// Copyright 2013 Dolphin Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.

#include "common/thread.h"

#ifdef __APPLE__
#include <mach/mach.h>
#elif defined(BSD4_4) || defined(__OpenBSD__)
#include <pthread_np.h>
#elif defined(_WIN32)
#include <Windows.h>
#endif

namespace Common
{

int CurrentThreadId()
{
#ifdef _WIN32
    return GetCurrentThreadId();
#elif defined __APPLE__
    return mach_thread_self();
#else
    return 0;
#endif
}

#ifdef _WIN32

void SetThreadAffinity(std::thread::native_handle_type thread, u32 mask)
{
    SetThreadAffinityMask(thread, mask);
}

void SetCurrentThreadAffinity(u32 mask)
{
    SetThreadAffinityMask(GetCurrentThread(), mask);
}

// Supporting functions
void SleepCurrentThread(int ms)
{
    Sleep(ms);
}

void SwitchCurrentThread()
{
    SwitchToThread();
}

// Sets the debugger-visible name of the current thread.
// Uses undocumented (actually, it is now documented) trick.
// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vsdebug/html/vxtsksettingthreadname.asp

// This is implemented much nicer in upcoming msvc++, see:
// http://msdn.microsoft.com/en-us/library/xcb2z8hs(VS.100).aspx
void SetCurrentThreadName(const char* szThreadName)
{
    static const DWORD MS_VC_EXCEPTION = 0x406D1388;

    #pragma pack(push,8)
    struct THREADNAME_INFO
    {
        DWORD dwType; // must be 0x1000
        LPCSTR szName; // pointer to name (in user addr space)
        DWORD dwThreadID; // thread ID (-1=caller thread)
        DWORD dwFlags; // reserved for future use, must be zero
    } info;
    #pragma pack(pop)

    info.dwType = 0x1000;
    info.szName = szThreadName;
    info.dwThreadID = -1; //dwThreadID;
    info.dwFlags = 0;

    __try
    {
        RaiseException(MS_VC_EXCEPTION, 0, sizeof(info)/sizeof(ULONG_PTR), (ULONG_PTR*)&info);
    }
    __except(EXCEPTION_CONTINUE_EXECUTION)
    {}
}

#else // !WIN32, so must be POSIX threads

void SetThreadAffinity(std::thread::native_handle_type thread, u32 mask)
{
#ifdef __APPLE__
    thread_policy_set(pthread_mach_thread_np(thread),
        THREAD_AFFINITY_POLICY, (integer_t *)&mask, 1);
#elif (defined __linux__ || defined BSD4_4) && !(defined ANDROID)
    cpu_set_t cpu_set;
    CPU_ZERO(&cpu_set);

    for (int i = 0; i != sizeof(mask) * 8; ++i)
        if ((mask >> i) & 1)
            CPU_SET(i, &cpu_set);

    pthread_setaffinity_np(thread, sizeof(cpu_set), &cpu_set);
#endif
}

void SetCurrentThreadAffinity(u32 mask)
{
    SetThreadAffinity(pthread_self(), mask);
}

void SleepCurrentThread(int ms)
{
    usleep(1000 * ms);
}

void SwitchCurrentThread()
{
    usleep(1000 * 1);
}

void SetCurrentThreadName(const char* szThreadName)
{
#ifdef __APPLE__
    pthread_setname_np(szThreadName);
#elif defined(__OpenBSD__)
    pthread_set_name_np(pthread_self(), szThreadName);
#else
    pthread_setname_np(pthread_self(), szThreadName);
#endif
}

#endif

} // namespace Common