58 lines
1.7 KiB
C++
58 lines
1.7 KiB
C++
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#include "memory.h"
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#include "modules/exceptions.h"
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// 1: linux, 2:windows, 3:mac
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#if defined( Q_OS_DARWIN )
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// Darwin-based systems: macOS, iOS, watchOS and tvOS.
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#include <unistd.h>
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#include <mach/mach.h>
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#elif defined( Q_OS_WIN )
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// Microsoft Windows systems
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#include <windows.h>
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#elif defined( Q_OS_UNIX )
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// Unix-like systems: Linux, BSD and SysV
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#include <unistd.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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const size_t availableMemory() {
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#if defined( Q_OS_DARWIN )
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// Darwin-based systems: macOS, iOS, watchOS and tvOS.
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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 GenericException("Failed to get host infos", true);
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}
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double n_pages{ vmstat.free_count };
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long page_size{ sysconf( _SC_PAGE_SIZE ) };
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if ( n_pages < 0.0 || 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_WIN )
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// Microsoft Windows systems
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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_UNIX )
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// Unix-like systems: Linux, BSD and SysV
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long n_pages{ sysconf( _SC_AVPHYS_PAGES ) };
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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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