import "OOCPUInfo.h"
#include <stdlib.h>
#include <sys/sysctl.h>

Include dependency graph for OOCPUInfo.m:

Functions
void	OOCPUInfoInit (void)

NSUInteger	OOCPUCount (void)

Variables
static BOOL	sInited = NO

static NSUInteger	sNumberOfCPUs = 0

Function Documentation

◆ OOCPUCount()

NSUInteger OOCPUCount ( void )

Definition at line 105 of file OOCPUInfo.m.

{
    if (!sInited)  OOCPUInfoInit();
    return (sNumberOfCPUs != 0) ? sNumberOfCPUs : 1;
}

References OOCPUInfoInit(), sInited, and sNumberOfCPUs.

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◆ OOCPUInfoInit()

void OOCPUInfoInit ( void )

Definition at line 64 of file OOCPUInfo.m.

{
    if (sInited)  return;
    
    // Verify correctness of endian macros
    uint8_t         endianTag[4] = {0x12, 0x34, 0x56, 0x78};
    
#if OOLITE_BIG_ENDIAN
    if (*(uint32_t*)endianTag != 0x12345678)
    {
        OOLog(@"cpuInfo.endianTest.failed", @"%@", @"OOLITE_BIG_ENDIAN is set, but the system is not big-endian -- aborting.");
        exit(EXIT_FAILURE);
    }
#endif
    
#if OOLITE_LITTLE_ENDIAN
    if (*(uint32_t*)endianTag != 0x78563412)
    {
        OOLog(@"cpuInfo.endianTest.failed", @"%@", @"OOLITE_LITTLE_ENDIAN is set, but the system is not little-endian -- aborting.");
        exit(EXIT_FAILURE);
    }
#endif
    
    // Count processors
#if OOLITE_MAC_OS_X
    sNumberOfCPUs = [[NSProcessInfo processInfo] processorCount];
#elif OOLITE_WINDOWS
    SYSTEM_INFO sysInfo;
    
    GetSystemInfo(&sysInfo);
    sNumberOfCPUs = sysInfo.dwNumberOfProcessors;
#elif defined _SC_NPROCESSORS_ONLN
    sNumberOfCPUs = sysconf(_SC_NPROCESSORS_ONLN);
#else
    #warning Do not know how to find number of CPUs on this architecture.
#endif  // OS selection
    
    sInited = YES;
}

References OOLog, sInited, and sNumberOfCPUs.

Referenced by OOCPUCount().

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Variable Documentation

◆ sInited

BOOL sInited = NO

static

Definition at line 58 of file OOCPUInfo.m.

Referenced by OOCPUCount(), and OOCPUInfoInit().

◆ sNumberOfCPUs

NSUInteger sNumberOfCPUs = 0