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sysspec_win32.cpp
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sysspec_win32.cpp
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#ifdef _WIN32
/***************************************************************************
* Copyright (C) 2006, 2014 by Veselin Georgiev *
* anrieff@mxgail.com (change to gmail) *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include "cxxptl.h"
/**
@class Mutex
**/
Mutex::Mutex()
{
InitializeCriticalSection(&cs);
}
Mutex::~Mutex()
{
DeleteCriticalSection(&cs);
}
void Mutex::enter(void)
{
EnterCriticalSection(&cs);
}
void Mutex::leave(void)
{
LeaveCriticalSection(&cs);
}
/**
@class Event
**/
Event::Event()
{
event = CreateEvent(NULL, FALSE, FALSE, NULL);
}
Event::~Event()
{
CloseHandle(event);
}
void Event::wait(void)
{
WaitForSingleObject(event, INFINITE);
}
void Event::signal(void)
{
SetEvent(event);
}
/**
@class Barrier
**/
Barrier::Barrier(int cpu_count)
{
event = CreateEvent(NULL, TRUE, FALSE, NULL);
set_threads(cpu_count);
}
Barrier::~Barrier()
{
CloseHandle(event);
}
void Barrier::set_threads(int cpu_count)
{
ResetEvent(event);
counter = cpu_count;
}
void Barrier::checkout(void)
{
int r = --counter;
if (r)
WaitForSingleObject(event, INFINITE);
else
SetEvent(event);
}
// FUNCTIONS
int system_get_processor_count(void)
{
SYSTEM_INFO system_info;
GetSystemInfo(&system_info);
return system_info.dwNumberOfProcessors;
}
int atomic_add(volatile int *addr, int val)
{
return InterlockedExchangeAdd((long*)addr, val);
}
DWORD WINAPI win32_thread_proc(void *data)
{
ThreadInfoStruct *info = static_cast<ThreadInfoStruct*>(data);
my_thread_proc(info);
return 0;
}
void new_thread(HANDLE *handle, ThreadInfoStruct *info)
{
DWORD useless;
*handle = CreateThread(NULL, 0, win32_thread_proc, info, 0, &useless);
CloseHandle(*handle);
}
int _intern_cpucount(void)
{
static int cpucount = -1;
if (cpucount == -1)
cpucount = system_get_processor_count();
return cpucount;
}
int get_affinity_mask(bool *mask)
{
int n = _intern_cpucount();
if (n > MAX_CPU_COUNT) n = MAX_CPU_COUNT;
PDWORD_PTR sysmask = 0, procmask = 0;
if (!GetProcessAffinityMask(GetCurrentProcess(), sysmask, procmask)) return -1;
for (int i = 0; i < n; i++) {
mask[i] = (0 != (procmask[i / 32] & (1 << (i % 32))));
}
return 0;
}
int set_affinity_mask(const bool *mask)
{
int n = _intern_cpucount();
if (n > 32) n = 32;
DWORD_PTR t = 0;
for (int i = 0; i < n; i++)
if (mask[i])
t |= (1u << (i % 32));
return (NULL != SetThreadAffinityMask(GetCurrentThread(), t)) ? 0 : -1;
}
#endif