57 lines
1.5 KiB
C++
57 lines
1.5 KiB
C++
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/*
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* 4coder malloc base allocator
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*/
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// TOP
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internal void*
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base_reserve__system(void *user_data, umem size, umem *size_out){
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System_Functions *system = (System_Functions*)user_data;
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umem extra_size = 128;
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umem increased_size = size + extra_size;
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size = round_up_umem(increased_size, KB(4));
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*size_out = size - extra_size;
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void *ptr = system->memory_allocate(size);
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*(umem*)ptr = size;
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ptr = (u8*)ptr + extra_size;
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return(ptr);
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}
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internal void
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base_free__system(void *user_data, void *ptr){
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System_Functions *system = (System_Functions*)user_data;
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umem extra_size = 128;
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ptr = (u8*)ptr - extra_size;
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umem size = *(umem*)ptr;
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system->memory_free(ptr, size);
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}
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internal Base_Allocator
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make_base_allocator_system(System_Functions *system){
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return(make_base_allocator(base_reserve__system, 0, 0,
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base_free__system, 0, system));
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}
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global Base_Allocator base_allocator_system = {};
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internal Arena
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make_arena_system(System_Functions *system, umem chunk_size, umem align){
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if (base_allocator_system.reserve == 0){
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base_allocator_system = make_base_allocator_system(system);
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}
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return(make_arena(&base_allocator_system, chunk_size, align));
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}
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internal Arena
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make_arena_system(System_Functions *system, umem chunk_size){
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return(make_arena_system(system, chunk_size, 8));
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}
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internal Arena
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make_arena_system(System_Functions *system){
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return(make_arena_system(system, KB(16), 8));
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}
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// BOTTOM
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