67 lines
2.0 KiB
C++
67 lines
2.0 KiB
C++
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#include "memory.h"
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#include "modules/exceptions.h"
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#if defined( Q_OS_UNIX )
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# include <unistd.h>
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# if defined( Q_OS_DARWIN )
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# include <mach/mach.h>
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# elif defined( Q_OS_BSD4 )
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# include <sys/types.h>
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# include <sys/sysctl.h>
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# include <sys/vmmeter.h>
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# endif
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#elif defined( Q_OS_WIN )
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# include <windows.h>
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#else
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# error "System not supported"
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#endif
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namespace MemOps {
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size_t availableMemory() {
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#if defined( Q_OS_WIN )
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MEMORYSTATUSEX mem_statexs;
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mem_statexs.dwLength = sizeof( mem_statexs );
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GlobalMemoryStatusEx( &mem_statexs );
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return static_cast<size_t>( mem_statexs.ullAvailPhys );
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#elif defined( Q_OS_DARWIN )
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mach_msg_type_number_t count{ HOST_VM_INFO_COUNT };
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vm_statistics_data_t vmstat;
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if ( host_statistics( mach_host_self(), HOST_VM_INFO, (host_info_t)&vmstat, &count ) != KERN_SUCCESS ) {
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throw DoNotCatchException("Failed to get host infos", "failed");
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}
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const natural_t n_pages{ vmstat.free_count };
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const long page_size{ sysconf( _SC_PAGE_SIZE ) };
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if ( n_pages < 0u || page_size < 0l ) {
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return 0ul;
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}
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return static_cast<size_t>( n_pages ) * static_cast<size_t>( page_size );
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#elif defined( Q_OS_BSD4 )
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vmtotal vmt;
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u_int page_size;
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size_t vmt_size{ sizeof(vmt) };
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size_t uint_size{ sizeof(page_size) };
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if ( sysctlbyname("vm.vmtotal", &vmt, &vmt_size, NULL, 0) < 0 ) {
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throw DoNotCatchException("Failed to get vmtotal", "failed");
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}
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if ( sysctlbyname("vm.stats.vm.v_page_size", &page_size, &uint_size, NULL, 0) < 0 ) {
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throw DoNotCatchException("Failed to get v_page_size", "failed");
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}
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return vmt.t_free * static_cast<size_t>( page_size );
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#elif defined( Q_OS_UNIX )
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const long n_pages{ sysconf( _SC_AVPHYS_PAGES ) };
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const long page_size{ sysconf( _SC_PAGE_SIZE ) };
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if ( n_pages < 0l || page_size < 0l ) {
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return 0ul;
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}
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return static_cast<size_t>( n_pages * page_size );
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#else
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# error "System not supported"
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#endif
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} // availableMemory()
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} // namespace MemOps
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