mirror of
https://github.com/Ed94/gencpp.git
synced 2024-12-22 15:54:45 -08:00
688 lines
22 KiB
C++
688 lines
22 KiB
C++
#ifdef GEN_INTELLISENSE_DIRECTIVES
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# pragma once
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# include "debug.hpp"
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#endif
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#pragma region Memory
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#define kilobytes( x ) ( ( x ) * ( s64 )( 1024 ) )
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#define megabytes( x ) ( kilobytes( x ) * ( s64 )( 1024 ) )
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#define gigabytes( x ) ( megabytes( x ) * ( s64 )( 1024 ) )
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#define terabytes( x ) ( gigabytes( x ) * ( s64 )( 1024 ) )
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#define GEN__ONES ( scast( GEN_NS usize, - 1) / GEN_U8_MAX )
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#define GEN__HIGHS ( GEN__ONES * ( GEN_U8_MAX / 2 + 1 ) )
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#define GEN__HAS_ZERO( x ) ( ( ( x ) - GEN__ONES ) & ~( x ) & GEN__HIGHS )
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template< class Type >
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void swap( Type& a, Type& b )
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{
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Type tmp = a;
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a = b;
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b = tmp;
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}
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GEN_API_C_BEGIN
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//! Checks if value is power of 2.
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b32 is_power_of_two( ssize x );
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//! Aligns address to specified alignment.
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void* align_forward( void* ptr, ssize alignment );
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//! Aligns value to a specified alignment.
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s64 align_forward_by_value( s64 value, ssize alignment );
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//! Moves pointer forward by bytes.
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void* pointer_add( void* ptr, ssize bytes );
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//! Moves pointer forward by bytes.
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void const* pointer_add_const( void const* ptr, ssize bytes );
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//! Calculates difference between two addresses.
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ssize pointer_diff( void const* begin, void const* end );
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//! Copy non-overlapping memory from source to destination.
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void* mem_copy( void* dest, void const* source, ssize size );
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//! Search for a constant value within the size limit at memory location.
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void const* mem_find( void const* data, u8 byte_value, ssize size );
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//! Copy memory from source to destination.
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void* mem_move( void* dest, void const* source, ssize size );
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//! Set constant value at memory location with specified size.
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void* mem_set( void* data, u8 byte_value, ssize size );
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//! @param ptr Memory location to clear up.
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//! @param size The size to clear up with.
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void zero_size( void* ptr, ssize size );
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//! Clears up an item.
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#define zero_item( t ) zero_size( ( t ), size_of( *( t ) ) ) // NOTE: Pass pointer of struct
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//! Clears up an array.
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#define zero_array( a, count ) zero_size( ( a ), size_of( *( a ) ) * count )
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enum AllocType_Def //enum_underlying(u8)
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{
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EAllocation_ALLOC,
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EAllocation_FREE,
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EAllocation_FREE_ALL,
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EAllocation_RESIZE,
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};
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typedef enum AllocType_Def AllocType;
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typedef void*(AllocatorProc)( void* allocator_data, AllocType type, ssize size, ssize alignment, void* old_memory, ssize old_size, u64 flags );
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struct AllocatorInfo_Def
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{
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AllocatorProc* Proc;
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void* Data;
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};
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typedef struct AllocatorInfo_Def AllocatorInfo;
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enum AllocFlag
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{
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ALLOCATOR_FLAG_CLEAR_TO_ZERO = bit( 0 ),
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};
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#ifndef GEN_DEFAULT_MEMORY_ALIGNMENT
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# define GEN_DEFAULT_MEMORY_ALIGNMENT ( 2 * size_of( void* ) )
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#endif
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#ifndef GEN_DEFAULT_ALLOCATOR_FLAGS
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# define GEN_DEFAULT_ALLOCATOR_FLAGS ( ALLOCATOR_FLAG_CLEAR_TO_ZERO )
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#endif
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//! Allocate memory with default alignment.
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void* alloc( AllocatorInfo a, ssize size );
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//! Allocate memory with specified alignment.
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void* alloc_align( AllocatorInfo a, ssize size, ssize alignment );
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//! Free allocated memory.
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void allocator_free( AllocatorInfo a, void* ptr );
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//! Free all memory allocated by an allocator.
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void free_all( AllocatorInfo a );
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//! Resize an allocated memory.
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void* resize( AllocatorInfo a, void* ptr, ssize old_size, ssize new_size );
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//! Resize an allocated memory with specified alignment.
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void* resize_align( AllocatorInfo a, void* ptr, ssize old_size, ssize new_size, ssize alignment );
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//! Allocate memory for an item.
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#define alloc_item( allocator_, Type ) ( Type* )alloc( allocator_, size_of( Type ) )
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//! Allocate memory for an array of items.
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#define alloc_array( allocator_, Type, count ) ( Type* )alloc( allocator_, size_of( Type ) * ( count ) )
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/* heap memory analysis tools */
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/* define GEN_HEAP_ANALYSIS to enable this feature */
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/* call zpl_heap_stats_init at the beginning of the entry point */
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/* you can call zpl_heap_stats_check near the end of the execution to validate any possible leaks */
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void heap_stats_init( void );
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ssize heap_stats_used_memory( void );
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ssize heap_stats_alloc_count( void );
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void heap_stats_check( void );
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//! Allocate/Resize memory using default options.
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//! Use this if you don't need a "fancy" resize allocation
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void* default_resize_align( AllocatorInfo a, void* ptr, ssize old_size, ssize new_size, ssize alignment );
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void* heap_allocator_proc( void* allocator_data, AllocType type, ssize size, ssize alignment, void* old_memory, ssize old_size, u64 flags );
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//! The heap allocator backed by operating system's memory manager.
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constexpr AllocatorInfo heap( void ) { AllocatorInfo allocator = { heap_allocator_proc, nullptr }; return allocator; }
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//! Helper to allocate memory using heap allocator.
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#define malloc( sz ) alloc( heap(), sz )
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//! Helper to free memory allocated by heap allocator.
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#define mfree( ptr ) free( heap(), ptr )
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struct VirtualMemory_Def
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{
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void* data;
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ssize size;
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};
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typedef struct VirtualMemory_Def VirtualMemory;
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//! Initialize virtual memory from existing data.
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VirtualMemory vm_from_memory( void* data, ssize size );
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//! Allocate virtual memory at address with size.
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//! @param addr The starting address of the region to reserve. If NULL, it lets operating system to decide where to allocate it.
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//! @param size The size to serve.
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VirtualMemory vm_alloc( void* addr, ssize size );
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//! Release the virtual memory.
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b32 vm_free( VirtualMemory vm );
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//! Trim virtual memory.
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VirtualMemory vm_trim( VirtualMemory vm, ssize lead_size, ssize size );
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//! Purge virtual memory.
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b32 vm_purge( VirtualMemory vm );
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//! Retrieve VM's page size and alignment.
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ssize virtual_memory_page_size( ssize* alignment_out );
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#pragma region Arena
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struct Arena_Def;
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typedef struct Arena_Def Arena;
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AllocatorInfo arena_allocator_info( Arena* arena );
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// Remove static keyword and rename allocator_proc
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void* arena_allocator_proc(void* allocator_data, AllocType type, ssize size, ssize alignment, void* old_memory, ssize old_size, u64 flags);
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// Add these declarations after the Arena struct
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Arena arena_init_from_allocator(AllocatorInfo backing, ssize size);
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Arena arena_init_from_memory ( void* start, ssize size );
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Arena arena_init_sub (Arena* parent, ssize size);
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ssize arena_alignment_of (Arena* arena, ssize alignment);
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void arena_check (Arena* arena);
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void arena_free (Arena* arena);
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ssize arena_size_remaining(Arena* arena, ssize alignment);
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struct Arena_Def
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{
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AllocatorInfo Backing;
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void* PhysicalStart;
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ssize TotalSize;
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ssize TotalUsed;
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ssize TempCount;
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#if GEN_SUPPORT_CPP_MEMBER_FEATURES
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#pragma region Member Mapping
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forceinline operator AllocatorInfo() { return GEN_NS arena_allocator_info(this); }
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forceinline static void* allocator_proc( void* allocator_data, AllocType type, ssize size, ssize alignment, void* old_memory, ssize old_size, u64 flags ) { return GEN_NS arena_allocator_proc( allocator_data, type, size, alignment, old_memory, old_size, flags ); }
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forceinline static Arena init_from_memory( void* start, ssize size ) { return GEN_NS arena_init_from_memory( start, size ); }
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forceinline static Arena init_from_allocator( AllocatorInfo backing, ssize size ) { return GEN_NS arena_init_from_allocator( backing, size ); }
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forceinline static Arena init_sub( Arena& parent, ssize size ) { return GEN_NS arena_init_from_allocator( parent.Backing, size ); }
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forceinline ssize alignment_of( ssize alignment ) { return GEN_NS arena_alignment_of(this, alignment); }
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forceinline void free() { return GEN_NS arena_free(this); }
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forceinline ssize size_remaining( ssize alignment ) { return GEN_NS arena_size_remaining(this, alignment); }
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// This id is defined by Unreal for asserts
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#pragma push_macro("check")
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#undef check
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forceinline void check() { GEN_NS arena_check(this); }
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#pragma pop_macro("check")
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#pragma endregion Member Mapping
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#endif
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};
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#if GEN_SUPPORT_CPP_REFERENCES
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GEN_API_C_END
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forceinline AllocatorInfo allocator_info(Arena& arena ) { return arena_allocator_info(& arena); }
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forceinline Arena init_sub (Arena& parent, ssize size) { return arena_init_sub( & parent, size); }
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forceinline ssize alignment_of (Arena& arena, ssize alignment) { return arena_alignment_of( & arena, alignment); }
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forceinline void free (Arena& arena) { return arena_free(& arena); }
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forceinline ssize size_remaining(Arena& arena, ssize alignment) { return arena_size_remaining(& arena, alignment); }
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// This id is defined by Unreal for asserts
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#pragma push_macro("check")
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#undef check
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forceinline void check(Arena& arena) { return arena_check(& arena); };
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#pragma pop_macro("check")
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GEN_API_C_BEGIN
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#endif
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inline
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AllocatorInfo arena_allocator_info( Arena* arena ) {
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GEN_ASSERT(arena != nullptr);
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AllocatorInfo info = { arena_allocator_proc, arena };
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return info;
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}
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inline
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Arena arena_init_from_memory( void* start, ssize size )
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{
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Arena arena = {
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{ nullptr, nullptr },
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start,
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size,
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0,
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0
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};
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return arena;
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}
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inline
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Arena arena_init_from_allocator(AllocatorInfo backing, ssize size) {
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Arena result = {
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backing,
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alloc(backing, size),
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size,
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0,
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0
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};
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return result;
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}
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inline
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Arena arena_init_sub(Arena* parent, ssize size) {
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GEN_ASSERT(parent != nullptr);
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return arena_init_from_allocator(parent->Backing, size);
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}
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inline
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ssize arena_alignment_of(Arena* arena, ssize alignment)
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{
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GEN_ASSERT(arena != nullptr);
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ssize alignment_offset, result_pointer, mask;
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GEN_ASSERT(is_power_of_two(alignment));
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alignment_offset = 0;
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result_pointer = (ssize)arena->PhysicalStart + arena->TotalUsed;
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mask = alignment - 1;
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if (result_pointer & mask)
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alignment_offset = alignment - (result_pointer & mask);
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return alignment_offset;
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}
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inline
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void arena_check(Arena* arena)
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{
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GEN_ASSERT(arena != nullptr );
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GEN_ASSERT(arena->TempCount == 0);
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}
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inline
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void arena_free(Arena* arena)
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{
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GEN_ASSERT(arena != nullptr);
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if (arena->Backing.Proc)
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{
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allocator_free(arena->Backing, arena->PhysicalStart);
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arena->PhysicalStart = nullptr;
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}
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}
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inline
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ssize arena_size_remaining(Arena* arena, ssize alignment)
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{
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GEN_ASSERT(arena != nullptr);
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ssize result = arena->TotalSize - (arena->TotalUsed + arena_alignment_of(arena, alignment));
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return result;
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}
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#pragma endregion Arena
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GEN_API_C_END
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#pragma region FixedArena
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template<s32 Size>
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struct FixedArena;
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template<s32 Size> FixedArena<Size> fixed_arena_init();
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template<s32 Size> AllocatorInfo allocator_info(FixedArena<Size>* fixed_arena );
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template<s32 Size> ssize size_remaining(FixedArena<Size>* fixed_arena, ssize alignment);
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#if GEN_SUPPORT_CPP_REFERENCES
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template<s32 Size> AllocatorInfo allocator_info( FixedArena<Size>& fixed_arena ) { return allocator_info(& fixed_arena); }
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template<s32 Size> ssize size_remaining(FixedArena<Size>& fixed_arena, ssize alignment) { return size_remaining( & fixed_arena, alignment); }
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#endif
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// Just a wrapper around using an arena with memory associated with its scope instead of from an allocator.
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// Used for static segment or stack allocations.
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template< s32 Size >
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struct FixedArena
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{
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char memory[Size];
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Arena arena;
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#if GEN_SUPPORT_CPP_MEMBER_FEATURES
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#pragma region Member Mapping
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forceinline operator AllocatorInfo() { return GEN_NS allocator_info(this); }
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forceinline static FixedArena init() { FixedArena result; GEN_NS fixed_arena_init<Size>(result); return result; }
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forceinline ssize size_remaining(ssize alignment) { GEN_NS size_remaining(this, alignment); }
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#pragma endregion Member Mapping
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#endif
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};
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template<s32 Size> inline
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AllocatorInfo allocator_info( FixedArena<Size>* fixed_arena ) {
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GEN_ASSERT(fixed_arena);
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return { arena_allocator_proc, & fixed_arena->arena };
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}
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template<s32 Size> inline
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void fixed_arena_init(FixedArena<Size>* result) {
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zero_size(& result->memory[0], Size);
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result->arena = arena_init_from_memory(& result->memory[0], Size);
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}
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template<s32 Size> inline
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ssize size_remaining(FixedArena<Size>* fixed_arena, ssize alignment) {
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return size_remaining(fixed_arena->arena, alignment);
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}
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using Arena_1KB = FixedArena< kilobytes( 1 ) >;
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using Arena_4KB = FixedArena< kilobytes( 4 ) >;
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using Arena_8KB = FixedArena< kilobytes( 8 ) >;
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using Arena_16KB = FixedArena< kilobytes( 16 ) >;
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using Arena_32KB = FixedArena< kilobytes( 32 ) >;
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using Arena_64KB = FixedArena< kilobytes( 64 ) >;
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using Arena_128KB = FixedArena< kilobytes( 128 ) >;
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using Arena_256KB = FixedArena< kilobytes( 256 ) >;
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using Arena_512KB = FixedArena< kilobytes( 512 ) >;
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using Arena_1MB = FixedArena< megabytes( 1 ) >;
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using Arena_2MB = FixedArena< megabytes( 2 ) >;
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using Arena_4MB = FixedArena< megabytes( 4 ) >;
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#pragma endregion FixedArena
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GEN_API_C_BEGIN
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#pragma region Pool
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struct Pool_Def;
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typedef struct Pool_Def Pool;
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void* pool_allocator_proc(void* allocator_data, AllocType type, ssize size, ssize alignment, void* old_memory, ssize old_size, u64 flags);
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Pool pool_init(AllocatorInfo backing, ssize num_blocks, ssize block_size);
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Pool pool_init_align(AllocatorInfo backing, ssize num_blocks, ssize block_size, ssize block_align);
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AllocatorInfo pool_allocator_info(Pool* pool);
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void pool_clear(Pool* pool);
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void pool_free(Pool* pool);
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#if GEN_SUPPORT_CPP_REFERENCES
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GEN_API_C_END
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AllocatorInfo allocator_info(Pool& pool) { return pool_allocator_info(& pool); }
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void clear(Pool& pool) { return pool_clear(& pool); }
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void free(Pool& pool) { return pool_free(& pool); }
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GEN_API_C_BEGIN
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#endif
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struct Pool_Def
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{
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AllocatorInfo Backing;
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void* PhysicalStart;
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void* FreeList;
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ssize BlockSize;
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ssize BlockAlign;
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ssize TotalSize;
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ssize NumBlocks;
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#if GEN_SUPPORT_CPP_MEMBER_FEATURES
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#pragma region Member Mapping
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forceinline operator AllocatorInfo() { return GEN_NS pool_allocator_info(this); }
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forceinline static void* allocator_proc(void* allocator_data, AllocType type, ssize size, ssize alignment, void* old_memory, ssize old_size, u64 flags) { return GEN_NS pool_allocator_proc(allocator_data, type, size, alignment, old_memory, old_size, flags); }
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forceinline static Pool init(AllocatorInfo backing, ssize num_blocks, ssize block_size) { return GEN_NS pool_init(backing, num_blocks, block_size); }
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forceinline static Pool init_align(AllocatorInfo backing, ssize num_blocks, ssize block_size, ssize block_align) { return GEN_NS pool_init_align(backing, num_blocks, block_size, block_align); }
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forceinline void clear() { GEN_NS pool_clear( this); }
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forceinline void free() { GEN_NS pool_free( this); }
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#pragma endregion
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#endif
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};
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inline
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AllocatorInfo pool_allocator_info(Pool* pool) {
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return { pool_allocator_proc, pool };
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}
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inline
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Pool pool_init(AllocatorInfo backing, ssize num_blocks, ssize block_size) {
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return pool_init_align(backing, num_blocks, block_size, GEN_DEFAULT_MEMORY_ALIGNMENT);
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}
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inline
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void pool_free(Pool* pool) {
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if(pool->Backing.Proc) {
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allocator_free(pool->Backing, pool->PhysicalStart);
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}
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}
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#pragma endregion Pool
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inline
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b32 is_power_of_two( ssize x ) {
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if ( x <= 0 )
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return false;
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return ! ( x & ( x - 1 ) );
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}
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inline
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mem_ptr align_forward( void* ptr, ssize alignment )
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{
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GEN_ASSERT( is_power_of_two( alignment ) );
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uptr p = to_uptr(ptr);
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uptr forward = (p + ( alignment - 1 ) ) & ~( alignment - 1 );
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return to_mem_ptr(forward);
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}
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inline s64 align_forward_s64( s64 value, ssize alignment ) { return value + ( alignment - value % alignment ) % alignment; }
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inline void* pointer_add ( void* ptr, ssize bytes ) { return rcast(void*, rcast( u8*, ptr) + bytes ); }
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inline void const* pointer_add_const( void const* ptr, ssize bytes ) { return rcast(void const*, rcast( u8 const*, ptr) + bytes ); }
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inline sptr pointer_diff( mem_ptr_const begin, mem_ptr_const end ) {
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return scast( ssize, rcast( u8 const*, end) - rcast(u8 const*, begin) );
|
|
}
|
|
|
|
inline
|
|
void* mem_move( void* destination, void const* source, ssize byte_count )
|
|
{
|
|
if ( destination == NULL )
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
u8* dest_ptr = rcast( u8*, destination);
|
|
u8 const* src_ptr = rcast( u8 const*, source);
|
|
|
|
if ( dest_ptr == src_ptr )
|
|
return dest_ptr;
|
|
|
|
if ( src_ptr + byte_count <= dest_ptr || dest_ptr + byte_count <= src_ptr ) // NOTE: Non-overlapping
|
|
return mem_copy( dest_ptr, src_ptr, byte_count );
|
|
|
|
if ( dest_ptr < src_ptr )
|
|
{
|
|
if ( to_uptr(src_ptr) % size_of( ssize ) == to_uptr(dest_ptr) % size_of( ssize ) )
|
|
{
|
|
while ( pcast( uptr, dest_ptr) % size_of( ssize ) )
|
|
{
|
|
if ( ! byte_count-- )
|
|
return destination;
|
|
|
|
*dest_ptr++ = *src_ptr++;
|
|
}
|
|
while ( byte_count >= size_of( ssize ) )
|
|
{
|
|
* rcast(ssize*, dest_ptr) = * rcast(ssize const*, src_ptr);
|
|
byte_count -= size_of( ssize );
|
|
dest_ptr += size_of( ssize );
|
|
src_ptr += size_of( ssize );
|
|
}
|
|
}
|
|
for ( ; byte_count; byte_count-- )
|
|
*dest_ptr++ = *src_ptr++;
|
|
}
|
|
else
|
|
{
|
|
if ( ( to_uptr(src_ptr) % size_of( ssize ) ) == ( to_uptr(dest_ptr) % size_of( ssize ) ) )
|
|
{
|
|
while ( to_uptr( dest_ptr + byte_count ) % size_of( ssize ) )
|
|
{
|
|
if ( ! byte_count-- )
|
|
return destination;
|
|
|
|
dest_ptr[ byte_count ] = src_ptr[ byte_count ];
|
|
}
|
|
while ( byte_count >= size_of( ssize ) )
|
|
{
|
|
byte_count -= size_of( ssize );
|
|
* rcast(ssize*, dest_ptr + byte_count ) = * rcast( ssize const*, src_ptr + byte_count );
|
|
}
|
|
}
|
|
while ( byte_count )
|
|
byte_count--, dest_ptr[ byte_count ] = src_ptr[ byte_count ];
|
|
}
|
|
|
|
return destination;
|
|
}
|
|
|
|
inline
|
|
void* mem_set( void* destination, u8 fill_byte, ssize byte_count )
|
|
{
|
|
if ( destination == NULL )
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
ssize align_offset;
|
|
u8* dest_ptr = rcast( u8*, destination);
|
|
u32 fill_word = ( ( u32 )-1 ) / 255 * fill_byte;
|
|
|
|
if ( byte_count == 0 )
|
|
return destination;
|
|
|
|
dest_ptr[ 0 ] = dest_ptr[ byte_count - 1 ] = fill_byte;
|
|
if ( byte_count < 3 )
|
|
return destination;
|
|
|
|
dest_ptr[ 1 ] = dest_ptr[ byte_count - 2 ] = fill_byte;
|
|
dest_ptr[ 2 ] = dest_ptr[ byte_count - 3 ] = fill_byte;
|
|
if ( byte_count < 7 )
|
|
return destination;
|
|
|
|
dest_ptr[ 3 ] = dest_ptr[ byte_count - 4 ] = fill_byte;
|
|
if ( byte_count < 9 )
|
|
return destination;
|
|
|
|
align_offset = -to_sptr( dest_ptr ) & 3;
|
|
dest_ptr += align_offset;
|
|
byte_count -= align_offset;
|
|
byte_count &= -4;
|
|
|
|
* rcast( u32*, ( dest_ptr + 0 ) ) = fill_word;
|
|
* rcast( u32*, ( dest_ptr + byte_count - 4 ) ) = fill_word;
|
|
if ( byte_count < 9 )
|
|
return destination;
|
|
|
|
* rcast( u32*, dest_ptr + 4 ) = fill_word;
|
|
* rcast( u32*, dest_ptr + 8 ) = fill_word;
|
|
* rcast( u32*, dest_ptr + byte_count - 12 ) = fill_word;
|
|
* rcast( u32*, dest_ptr + byte_count - 8 ) = fill_word;
|
|
if ( byte_count < 25 )
|
|
return destination;
|
|
|
|
* rcast( u32*, dest_ptr + 12 ) = fill_word;
|
|
* rcast( u32*, dest_ptr + 16 ) = fill_word;
|
|
* rcast( u32*, dest_ptr + 20 ) = fill_word;
|
|
* rcast( u32*, dest_ptr + 24 ) = fill_word;
|
|
* rcast( u32*, dest_ptr + byte_count - 28 ) = fill_word;
|
|
* rcast( u32*, dest_ptr + byte_count - 24 ) = fill_word;
|
|
* rcast( u32*, dest_ptr + byte_count - 20 ) = fill_word;
|
|
* rcast( u32*, dest_ptr + byte_count - 16 ) = fill_word;
|
|
|
|
align_offset = 24 + to_uptr( dest_ptr ) & 4;
|
|
dest_ptr += align_offset;
|
|
byte_count -= align_offset;
|
|
|
|
{
|
|
u64 fill_doubleword = ( scast( u64, fill_word) << 32 ) | fill_word;
|
|
while ( byte_count > 31 )
|
|
{
|
|
* rcast( u64*, dest_ptr + 0 ) = fill_doubleword;
|
|
* rcast( u64*, dest_ptr + 8 ) = fill_doubleword;
|
|
* rcast( u64*, dest_ptr + 16 ) = fill_doubleword;
|
|
* rcast( u64*, dest_ptr + 24 ) = fill_doubleword;
|
|
|
|
byte_count -= 32;
|
|
dest_ptr += 32;
|
|
}
|
|
}
|
|
|
|
return destination;
|
|
}
|
|
|
|
inline
|
|
void* alloc_align( AllocatorInfo a, ssize size, ssize alignment ) {
|
|
return a.Proc( a.Data, EAllocation_ALLOC, size, alignment, nullptr, 0, GEN_DEFAULT_ALLOCATOR_FLAGS );
|
|
}
|
|
|
|
inline
|
|
void* alloc( AllocatorInfo a, ssize size ) {
|
|
return alloc_align( a, size, GEN_DEFAULT_MEMORY_ALIGNMENT );
|
|
}
|
|
|
|
inline
|
|
void allocator_free( AllocatorInfo a, void* ptr ) {
|
|
if ( ptr != nullptr )
|
|
a.Proc( a.Data, EAllocation_FREE, 0, 0, ptr, 0, GEN_DEFAULT_ALLOCATOR_FLAGS );
|
|
}
|
|
|
|
inline
|
|
void free_all( AllocatorInfo a ) {
|
|
a.Proc( a.Data, EAllocation_FREE_ALL, 0, 0, nullptr, 0, GEN_DEFAULT_ALLOCATOR_FLAGS );
|
|
}
|
|
|
|
inline
|
|
void* resize( AllocatorInfo a, void* ptr, ssize old_size, ssize new_size ) {
|
|
return resize_align( a, ptr, old_size, new_size, GEN_DEFAULT_MEMORY_ALIGNMENT );
|
|
}
|
|
|
|
inline
|
|
void* resize_align( AllocatorInfo a, void* ptr, ssize old_size, ssize new_size, ssize alignment ) {
|
|
return a.Proc( a.Data, EAllocation_RESIZE, new_size, alignment, ptr, old_size, GEN_DEFAULT_ALLOCATOR_FLAGS );
|
|
}
|
|
|
|
inline
|
|
void* default_resize_align( AllocatorInfo a, void* old_memory, ssize old_size, ssize new_size, ssize alignment )
|
|
{
|
|
if ( ! old_memory )
|
|
return alloc_align( a, new_size, alignment );
|
|
|
|
if ( new_size == 0 )
|
|
{
|
|
allocator_free( a, old_memory );
|
|
return nullptr;
|
|
}
|
|
|
|
if ( new_size < old_size )
|
|
new_size = old_size;
|
|
|
|
if ( old_size == new_size )
|
|
{
|
|
return old_memory;
|
|
}
|
|
else
|
|
{
|
|
void* new_memory = alloc_align( a, new_size, alignment );
|
|
if ( ! new_memory )
|
|
return nullptr;
|
|
|
|
mem_move( new_memory, old_memory, min( new_size, old_size ) );
|
|
allocator_free( a, old_memory );
|
|
return new_memory;
|
|
}
|
|
}
|
|
|
|
inline
|
|
void zero_size( void* ptr, ssize size ) {
|
|
mem_set( ptr, 0, size );
|
|
}
|
|
|
|
GEN_API_C_END
|
|
|
|
#pragma endregion Memory
|