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opencv/modules/core/src/system.cpp
Andrey Kamaev 2a6fb2867e Remove all using directives for STL namespace and members 
Made all STL usages explicit to be able automatically find all usages of
particular class or function.
2013-02-25 15:04:17 +04:00

907 lines
24 KiB
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/*M///////////////////////////////////////////////////////////////////////////////////////
//
// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
// By downloading, copying, installing or using the software you agree to this license.
// If you do not agree to this license, do not download, install,
// copy or use the software.
//
//
// License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistribution's of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistribution's in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * The name of the copyright holders may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// This software is provided by the copyright holders and contributors "as is" and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//M*/
#include "precomp.hpp"
#if defined WIN32 || defined _WIN32 || defined WINCE
#ifndef _WIN32_WINNT // This is needed for the declaration of TryEnterCriticalSection in winbase.h with Visual Studio 2005 (and older?)
#define _WIN32_WINNT 0x0400 // http://msdn.microsoft.com/en-us/library/ms686857(VS.85).aspx
#endif
#include <windows.h>
#undef small
#undef min
#undef max
#undef abs
#include <tchar.h>
#if defined _MSC_VER
#if _MSC_VER >= 1400
#include <intrin.h>
#elif defined _M_IX86
static void __cpuid(int* cpuid_data, int)
{
__asm
{
push ebx
push edi
mov edi, cpuid_data
mov eax, 1
cpuid
mov [edi], eax
mov [edi + 4], ebx
mov [edi + 8], ecx
mov [edi + 12], edx
pop edi
pop ebx
}
}
#endif
#endif
#else
#include <pthread.h>
#include <sys/time.h>
#include <time.h>
#if defined __MACH__ && defined __APPLE__
#include <mach/mach.h>
#include <mach/mach_time.h>
#endif
#endif
#ifdef _OPENMP
#include "omp.h"
#endif
#include <stdarg.h>
#if defined __linux__ || defined __APPLE__
#include <unistd.h>
#include <stdio.h>
#include <sys/types.h>
#if defined ANDROID
#include <sys/sysconf.h>
#else
#include <sys/sysctl.h>
#endif
#endif
#ifdef ANDROID
# include <android/log.h>
#endif
namespace cv
{
Exception::Exception() { code = 0; line = 0; }
Exception::Exception(int _code, const std::string& _err, const std::string& _func, const std::string& _file, int _line)
: code(_code), err(_err), func(_func), file(_file), line(_line)
{
formatMessage();
}
Exception::~Exception() throw() {}
/*!
\return the error description and the context as a text string.
*/
const char* Exception::what() const throw() { return msg.c_str(); }
void Exception::formatMessage()
{
if( func.size() > 0 )
msg = format("%s:%d: error: (%d) %s in function %s\n", file.c_str(), line, code, err.c_str(), func.c_str());
else
msg = format("%s:%d: error: (%d) %s\n", file.c_str(), line, code, err.c_str());
}
struct HWFeatures
{
enum { MAX_FEATURE = CV_HARDWARE_MAX_FEATURE };
HWFeatures(void)
{
memset( have, 0, sizeof(have) );
x86_family = 0;
}
static HWFeatures initialize(void)
{
HWFeatures f;
int cpuid_data[4] = { 0, 0, 0, 0 };
#if defined _MSC_VER && (defined _M_IX86 || defined _M_X64)
__cpuid(cpuid_data, 1);
#elif defined __GNUC__ && (defined __i386__ || defined __x86_64__)
#ifdef __x86_64__
asm __volatile__
(
"movl $1, %%eax\n\t"
"cpuid\n\t"
:[eax]"=a"(cpuid_data[0]),[ebx]"=b"(cpuid_data[1]),[ecx]"=c"(cpuid_data[2]),[edx]"=d"(cpuid_data[3])
:
: "cc"
);
#else
asm volatile
(
"pushl %%ebx\n\t"
"movl $1,%%eax\n\t"
"cpuid\n\t"
"popl %%ebx\n\t"
: "=a"(cpuid_data[0]), "=c"(cpuid_data[2]), "=d"(cpuid_data[3])
:
: "cc"
);
#endif
#endif
f.x86_family = (cpuid_data[0] >> 8) & 15;
if( f.x86_family >= 6 )
{
f.have[CV_CPU_MMX] = (cpuid_data[3] & (1 << 23)) != 0;
f.have[CV_CPU_SSE] = (cpuid_data[3] & (1<<25)) != 0;
f.have[CV_CPU_SSE2] = (cpuid_data[3] & (1<<26)) != 0;
f.have[CV_CPU_SSE3] = (cpuid_data[2] & (1<<0)) != 0;
f.have[CV_CPU_SSSE3] = (cpuid_data[2] & (1<<9)) != 0;
f.have[CV_CPU_SSE4_1] = (cpuid_data[2] & (1<<19)) != 0;
f.have[CV_CPU_SSE4_2] = (cpuid_data[2] & (1<<20)) != 0;
f.have[CV_CPU_POPCNT] = (cpuid_data[2] & (1<<23)) != 0;
f.have[CV_CPU_AVX] = (((cpuid_data[2] & (1<<28)) != 0)&&((cpuid_data[2] & (1<<27)) != 0));//OS uses XSAVE_XRSTORE and CPU support AVX
}
return f;
}
int x86_family;
bool have[MAX_FEATURE+1];
};
static HWFeatures featuresEnabled = HWFeatures::initialize(), featuresDisabled = HWFeatures();
static HWFeatures* currentFeatures = &featuresEnabled;
bool checkHardwareSupport(int feature)
{
CV_DbgAssert( 0 <= feature && feature <= CV_HARDWARE_MAX_FEATURE );
return currentFeatures->have[feature];
}
volatile bool useOptimizedFlag = true;
#ifdef HAVE_IPP
struct IPPInitializer
{
IPPInitializer(void) { ippStaticInit(); }
};
IPPInitializer ippInitializer;
#endif
volatile bool USE_SSE2 = featuresEnabled.have[CV_CPU_SSE2];
volatile bool USE_SSE4_2 = featuresEnabled.have[CV_CPU_SSE4_2];
volatile bool USE_AVX = featuresEnabled.have[CV_CPU_AVX];
void setUseOptimized( bool flag )
{
useOptimizedFlag = flag;
currentFeatures = flag ? &featuresEnabled : &featuresDisabled;
USE_SSE2 = currentFeatures->have[CV_CPU_SSE2];
}
bool useOptimized(void)
{
return useOptimizedFlag;
}
int64 getTickCount(void)
{
#if defined WIN32 || defined _WIN32 || defined WINCE
LARGE_INTEGER counter;
QueryPerformanceCounter( &counter );
return (int64)counter.QuadPart;
#elif defined __linux || defined __linux__
struct timespec tp;
clock_gettime(CLOCK_MONOTONIC, &tp);
return (int64)tp.tv_sec*1000000000 + tp.tv_nsec;
#elif defined __MACH__ && defined __APPLE__
return (int64)mach_absolute_time();
#else
struct timeval tv;
struct timezone tz;
gettimeofday( &tv, &tz );
return (int64)tv.tv_sec*1000000 + tv.tv_usec;
#endif
}
double getTickFrequency(void)
{
#if defined WIN32 || defined _WIN32 || defined WINCE
LARGE_INTEGER freq;
QueryPerformanceFrequency(&freq);
return (double)freq.QuadPart;
#elif defined __linux || defined __linux__
return 1e9;
#elif defined __MACH__ && defined __APPLE__
static double freq = 0;
if( freq == 0 )
{
mach_timebase_info_data_t sTimebaseInfo;
mach_timebase_info(&sTimebaseInfo);
freq = sTimebaseInfo.denom*1e9/sTimebaseInfo.numer;
}
return freq;
#else
return 1e6;
#endif
}
#if defined __GNUC__ && (defined __i386__ || defined __x86_64__ || defined __ppc__)
#if defined(__i386__)
int64 getCPUTickCount(void)
{
int64 x;
__asm__ volatile (".byte 0x0f, 0x31" : "=A" (x));
return x;
}
#elif defined(__x86_64__)
int64 getCPUTickCount(void)
{
unsigned hi, lo;
__asm__ __volatile__ ("rdtsc" : "=a"(lo), "=d"(hi));
return (int64)lo | ((int64)hi << 32);
}
#elif defined(__ppc__)
int64 getCPUTickCount(void)
{
int64 result = 0;
unsigned upper, lower, tmp;
__asm__ volatile(
"0: \n"
"\tmftbu %0 \n"
"\tmftb %1 \n"
"\tmftbu %2 \n"
"\tcmpw %2,%0 \n"
"\tbne 0b \n"
: "=r"(upper),"=r"(lower),"=r"(tmp)
);
return lower | ((int64)upper << 32);
}
#else
#error "RDTSC not defined"
#endif
#elif defined _MSC_VER && defined WIN32 && defined _M_IX86
int64 getCPUTickCount(void)
{
__asm _emit 0x0f;
__asm _emit 0x31;
}
#else
#ifdef HAVE_IPP
int64 getCPUTickCount(void)
{
return ippGetCpuClocks();
}
#else
int64 getCPUTickCount(void)
{
return getTickCount();
}
#endif
#endif
const std::string& getBuildInformation()
{
static std::string build_info =
#include "version_string.inc"
;
return build_info;
}
std::string format( const char* fmt, ... )
{
char buf[1 << 16];
va_list args;
va_start( args, fmt );
vsprintf( buf, fmt, args );
return std::string(buf);
}
std::string tempfile( const char* suffix )
{
const char *temp_dir = getenv("OPENCV_TEMP_PATH");
std::string fname;
#if defined WIN32 || defined _WIN32
char temp_dir2[MAX_PATH + 1] = { 0 };
char temp_file[MAX_PATH + 1] = { 0 };
if (temp_dir == 0 || temp_dir[0] == 0)
{
::GetTempPathA(sizeof(temp_dir2), temp_dir2);
temp_dir = temp_dir2;
}
if(0 == ::GetTempFileNameA(temp_dir, "ocv", 0, temp_file))
return std::string();
DeleteFileA(temp_file);
fname = temp_file;
# else
# ifdef ANDROID
//char defaultTemplate[] = "/mnt/sdcard/__opencv_temp.XXXXXX";
char defaultTemplate[] = "/data/local/tmp/__opencv_temp.XXXXXX";
# else
char defaultTemplate[] = "/tmp/__opencv_temp.XXXXXX";
# endif
if (temp_dir == 0 || temp_dir[0] == 0)
fname = defaultTemplate;
else
{
fname = temp_dir;
char ech = fname[fname.size() - 1];
if(ech != '/' && ech != '\\')
fname += "/";
fname += "__opencv_temp.XXXXXX";
}
const int fd = mkstemp((char*)fname.c_str());
if (fd == -1) return std::string();
close(fd);
remove(fname.c_str());
# endif
if (suffix)
{
if (suffix[0] != '.')
return fname + "." + suffix;
else
return fname + suffix;
}
return fname;
}
static CvErrorCallback customErrorCallback = 0;
static void* customErrorCallbackData = 0;
static bool breakOnError = false;
bool setBreakOnError(bool value)
{
bool prevVal = breakOnError;
breakOnError = value;
return prevVal;
}
void error( const Exception& exc )
{
if (customErrorCallback != 0)
customErrorCallback(exc.code, exc.func.c_str(), exc.err.c_str(),
exc.file.c_str(), exc.line, customErrorCallbackData);
else
{
const char* errorStr = cvErrorStr(exc.code);
char buf[1 << 16];
sprintf( buf, "OpenCV Error: %s (%s) in %s, file %s, line %d",
errorStr, exc.err.c_str(), exc.func.size() > 0 ?
exc.func.c_str() : "unknown function", exc.file.c_str(), exc.line );
fprintf( stderr, "%s\n", buf );
fflush( stderr );
# ifdef __ANDROID__
__android_log_print(ANDROID_LOG_ERROR, "cv::error()", "%s", buf);
# endif
}
if(breakOnError)
{
static volatile int* p = 0;
*p = 0;
}
throw exc;
}
CvErrorCallback
redirectError( CvErrorCallback errCallback, void* userdata, void** prevUserdata)
{
if( prevUserdata )
*prevUserdata = customErrorCallbackData;
CvErrorCallback prevCallback = customErrorCallback;
customErrorCallback = errCallback;
customErrorCallbackData = userdata;
return prevCallback;
}
}
/*CV_IMPL int
cvGuiBoxReport( int code, const char *func_name, const char *err_msg,
const char *file, int line, void* )
{
#if (!defined WIN32 && !defined _WIN32) || defined WINCE
return cvStdErrReport( code, func_name, err_msg, file, line, 0 );
#else
if( code != CV_StsBackTrace && code != CV_StsAutoTrace )
{
size_t msg_len = strlen(err_msg ? err_msg : "") + 1024;
char* message = (char*)alloca(msg_len);
char title[100];
wsprintf( message, "%s (%s)\nin function %s, %s(%d)\n\n"
"Press \"Abort\" to terminate application.\n"
"Press \"Retry\" to debug (if the app is running under debugger).\n"
"Press \"Ignore\" to continue (this is not safe).\n",
cvErrorStr(code), err_msg ? err_msg : "no description",
func_name, file, line );
wsprintf( title, "OpenCV GUI Error Handler" );
int answer = MessageBox( NULL, message, title, MB_ICONERROR|MB_ABORTRETRYIGNORE|MB_SYSTEMMODAL );
if( answer == IDRETRY )
{
CV_DBG_BREAK();
}
return answer != IDIGNORE;
}
return 0;
#endif
}*/
CV_IMPL int cvCheckHardwareSupport(int feature)
{
CV_DbgAssert( 0 <= feature && feature <= CV_HARDWARE_MAX_FEATURE );
return cv::currentFeatures->have[feature];
}
CV_IMPL int cvUseOptimized( int flag )
{
int prevMode = cv::useOptimizedFlag;
cv::setUseOptimized( flag != 0 );
return prevMode;
}
CV_IMPL int64 cvGetTickCount(void)
{
return cv::getTickCount();
}
CV_IMPL double cvGetTickFrequency(void)
{
return cv::getTickFrequency()*1e-6;
}
CV_IMPL CvErrorCallback
cvRedirectError( CvErrorCallback errCallback, void* userdata, void** prevUserdata)
{
return cv::redirectError(errCallback, userdata, prevUserdata);
}
CV_IMPL int cvNulDevReport( int, const char*, const char*,
const char*, int, void* )
{
return 0;
}
CV_IMPL int cvStdErrReport( int, const char*, const char*,
const char*, int, void* )
{
return 0;
}
CV_IMPL int cvGuiBoxReport( int, const char*, const char*,
const char*, int, void* )
{
return 0;
}
CV_IMPL int cvGetErrInfo( const char**, const char**, const char**, int* )
{
return 0;
}
CV_IMPL const char* cvErrorStr( int status )
{
static char buf[256];
switch (status)
{
case CV_StsOk : return "No Error";
case CV_StsBackTrace : return "Backtrace";
case CV_StsError : return "Unspecified error";
case CV_StsInternal : return "Internal error";
case CV_StsNoMem : return "Insufficient memory";
case CV_StsBadArg : return "Bad argument";
case CV_StsNoConv : return "Iterations do not converge";
case CV_StsAutoTrace : return "Autotrace call";
case CV_StsBadSize : return "Incorrect size of input array";
case CV_StsNullPtr : return "Null pointer";
case CV_StsDivByZero : return "Division by zero occured";
case CV_BadStep : return "Image step is wrong";
case CV_StsInplaceNotSupported : return "Inplace operation is not supported";
case CV_StsObjectNotFound : return "Requested object was not found";
case CV_BadDepth : return "Input image depth is not supported by function";
case CV_StsUnmatchedFormats : return "Formats of input arguments do not match";
case CV_StsUnmatchedSizes : return "Sizes of input arguments do not match";
case CV_StsOutOfRange : return "One of arguments\' values is out of range";
case CV_StsUnsupportedFormat : return "Unsupported format or combination of formats";
case CV_BadCOI : return "Input COI is not supported";
case CV_BadNumChannels : return "Bad number of channels";
case CV_StsBadFlag : return "Bad flag (parameter or structure field)";
case CV_StsBadPoint : return "Bad parameter of type CvPoint";
case CV_StsBadMask : return "Bad type of mask argument";
case CV_StsParseError : return "Parsing error";
case CV_StsNotImplemented : return "The function/feature is not implemented";
case CV_StsBadMemBlock : return "Memory block has been corrupted";
case CV_StsAssert : return "Assertion failed";
case CV_GpuNotSupported : return "No GPU support";
case CV_GpuApiCallError : return "Gpu API call";
case CV_OpenGlNotSupported : return "No OpenGL support";
case CV_OpenGlApiCallError : return "OpenGL API call";
};
sprintf(buf, "Unknown %s code %d", status >= 0 ? "status":"error", status);
return buf;
}
CV_IMPL int cvGetErrMode(void)
{
return 0;
}
CV_IMPL int cvSetErrMode(int)
{
return 0;
}
CV_IMPL int cvGetErrStatus(void)
{
return 0;
}
CV_IMPL void cvSetErrStatus(int)
{
}
CV_IMPL void cvError( int code, const char* func_name,
const char* err_msg,
const char* file_name, int line )
{
cv::error(cv::Exception(code, err_msg, func_name, file_name, line));
}
/* function, which converts int to int */
CV_IMPL int
cvErrorFromIppStatus( int status )
{
switch (status)
{
case CV_BADSIZE_ERR: return CV_StsBadSize;
case CV_BADMEMBLOCK_ERR: return CV_StsBadMemBlock;
case CV_NULLPTR_ERR: return CV_StsNullPtr;
case CV_DIV_BY_ZERO_ERR: return CV_StsDivByZero;
case CV_BADSTEP_ERR: return CV_BadStep;
case CV_OUTOFMEM_ERR: return CV_StsNoMem;
case CV_BADARG_ERR: return CV_StsBadArg;
case CV_NOTDEFINED_ERR: return CV_StsError;
case CV_INPLACE_NOT_SUPPORTED_ERR: return CV_StsInplaceNotSupported;
case CV_NOTFOUND_ERR: return CV_StsObjectNotFound;
case CV_BADCONVERGENCE_ERR: return CV_StsNoConv;
case CV_BADDEPTH_ERR: return CV_BadDepth;
case CV_UNMATCHED_FORMATS_ERR: return CV_StsUnmatchedFormats;
case CV_UNSUPPORTED_COI_ERR: return CV_BadCOI;
case CV_UNSUPPORTED_CHANNELS_ERR: return CV_BadNumChannels;
case CV_BADFLAG_ERR: return CV_StsBadFlag;
case CV_BADRANGE_ERR: return CV_StsBadArg;
case CV_BADCOEF_ERR: return CV_StsBadArg;
case CV_BADFACTOR_ERR: return CV_StsBadArg;
case CV_BADPOINT_ERR: return CV_StsBadPoint;
default:
return CV_StsError;
}
}
static CvModuleInfo cxcore_info = { 0, "cxcore", CV_VERSION, 0 };
CvModuleInfo* CvModule::first = 0, *CvModule::last = 0;
CvModule::CvModule( CvModuleInfo* _info )
{
cvRegisterModule( _info );
info = last;
}
CvModule::~CvModule(void)
{
if( info )
{
CvModuleInfo* p = first;
for( ; p != 0 && p->next != info; p = p->next )
;
if( p )
p->next = info->next;
if( first == info )
first = info->next;
if( last == info )
last = p;
free( info );
info = 0;
}
}
CV_IMPL int
cvRegisterModule( const CvModuleInfo* module )
{
CV_Assert( module != 0 && module->name != 0 && module->version != 0 );
size_t name_len = strlen(module->name);
size_t version_len = strlen(module->version);
CvModuleInfo* module_copy = (CvModuleInfo*)malloc( sizeof(*module_copy) +
name_len + 1 + version_len + 1 );
*module_copy = *module;
module_copy->name = (char*)(module_copy + 1);
module_copy->version = (char*)(module_copy + 1) + name_len + 1;
memcpy( (void*)module_copy->name, module->name, name_len + 1 );
memcpy( (void*)module_copy->version, module->version, version_len + 1 );
module_copy->next = 0;
if( CvModule::first == 0 )
CvModule::first = module_copy;
else
CvModule::last->next = module_copy;
CvModule::last = module_copy;
return 0;
}
CvModule cxcore_module( &cxcore_info );
CV_IMPL void
cvGetModuleInfo( const char* name, const char **version, const char **plugin_list )
{
static char joint_verinfo[1024] = "";
static char plugin_list_buf[1024] = "";
if( version )
*version = 0;
if( plugin_list )
*plugin_list = 0;
CvModuleInfo* module;
if( version )
{
if( name )
{
size_t i, name_len = strlen(name);
for( module = CvModule::first; module != 0; module = module->next )
{
if( strlen(module->name) == name_len )
{
for( i = 0; i < name_len; i++ )
{
int c0 = toupper(module->name[i]), c1 = toupper(name[i]);
if( c0 != c1 )
break;
}
if( i == name_len )
break;
}
}
if( !module )
CV_Error( CV_StsObjectNotFound, "The module is not found" );
*version = module->version;
}
else
{
char* ptr = joint_verinfo;
for( module = CvModule::first; module != 0; module = module->next )
{
sprintf( ptr, "%s: %s%s", module->name, module->version, module->next ? ", " : "" );
ptr += strlen(ptr);
}
*version = joint_verinfo;
}
}
if( plugin_list )
*plugin_list = plugin_list_buf;
}
#if defined BUILD_SHARED_LIBS && defined CVAPI_EXPORTS && defined WIN32 && !defined WINCE
BOOL WINAPI DllMain( HINSTANCE, DWORD fdwReason, LPVOID );
BOOL WINAPI DllMain( HINSTANCE, DWORD fdwReason, LPVOID )
{
if( fdwReason == DLL_THREAD_DETACH || fdwReason == DLL_PROCESS_DETACH )
{
cv::deleteThreadAllocData();
cv::deleteThreadRNGData();
}
return TRUE;
}
#endif
namespace cv
{
#if defined WIN32 || defined _WIN32 || defined WINCE
struct Mutex::Impl
{
Impl() { InitializeCriticalSection(&cs); refcount = 1; }
~Impl() { DeleteCriticalSection(&cs); }
void lock() { EnterCriticalSection(&cs); }
bool trylock() { return TryEnterCriticalSection(&cs) != 0; }
void unlock() { LeaveCriticalSection(&cs); }
CRITICAL_SECTION cs;
int refcount;
};
#ifndef __GNUC__
int _interlockedExchangeAdd(int* addr, int delta)
{
#if defined _MSC_VER && _MSC_VER >= 1500
return (int)_InterlockedExchangeAdd((long volatile*)addr, delta);
#else
return (int)InterlockedExchangeAdd((long volatile*)addr, delta);
#endif
}
#endif // __GNUC__
#elif defined __APPLE__
#include <libkern/OSAtomic.h>
struct Mutex::Impl
{
Impl() { sl = OS_SPINLOCK_INIT; refcount = 1; }
~Impl() {}
void lock() { OSSpinLockLock(&sl); }
bool trylock() { return OSSpinLockTry(&sl); }
void unlock() { OSSpinLockUnlock(&sl); }
OSSpinLock sl;
int refcount;
};
#elif defined __linux__ && !defined ANDROID
struct Mutex::Impl
{
Impl() { pthread_spin_init(&sl, 0); refcount = 1; }
~Impl() { pthread_spin_destroy(&sl); }
void lock() { pthread_spin_lock(&sl); }
bool trylock() { return pthread_spin_trylock(&sl) == 0; }
void unlock() { pthread_spin_unlock(&sl); }
pthread_spinlock_t sl;
int refcount;
};
#else
struct Mutex::Impl
{
Impl() { pthread_mutex_init(&sl, 0); refcount = 1; }
~Impl() { pthread_mutex_destroy(&sl); }
void lock() { pthread_mutex_lock(&sl); }
bool trylock() { return pthread_mutex_trylock(&sl) == 0; }
void unlock() { pthread_mutex_unlock(&sl); }
pthread_mutex_t sl;
int refcount;
};
#endif
Mutex::Mutex()
{
impl = new Mutex::Impl;
}
Mutex::~Mutex()
{
if( CV_XADD(&impl->refcount, -1) == 1 )
delete impl;
impl = 0;
}
Mutex::Mutex(const Mutex& m)
{
impl = m.impl;
CV_XADD(&impl->refcount, 1);
}
Mutex& Mutex::operator = (const Mutex& m)
{
CV_XADD(&m.impl->refcount, 1);
if( CV_XADD(&impl->refcount, -1) == 1 )
delete impl;
impl = m.impl;
return *this;
}
void Mutex::lock() { impl->lock(); }
void Mutex::unlock() { impl->unlock(); }
bool Mutex::trylock() { return impl->trylock(); }
}
/* End of file. */
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