58 lines
1.0 KiB
C
58 lines
1.0 KiB
C
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#ifndef LUMENARIUM_LINUX_MEMORY_H
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#define LUMENARIUM_LINUX_MEMORY_H 1
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global u64 linux_page_size_cache_ = 0;
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// https://stackoverflow.com/questions/3351940/detecting-the-memory-page-size
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u64
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os_page_size()
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{
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if (linux_page_size_cache_ == 0)
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{
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long page_size = sysconf(_SC_PAGE_SIZE);
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linux_page_size_cache_ = (u64)page_size;
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}
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return linux_page_size_cache_;
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}
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size_t
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linux_round_to_page_size(uint64_t size)
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{
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uint64_t rem = size % linux_page_size_cache_;
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if (rem != 0 || size < linux_page_size_cache_)
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{
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uint64_t grow = linux_page_size_cache_ - rem;
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size += grow;
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}
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return (size_t)size;
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}
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u8*
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os_mem_reserve(u64 size)
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{
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size_t size_cvt = linux_round_to_page_size(size);
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uint8_t* result = (uint8_t*)malloc(size_cvt);
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return result;
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}
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u8*
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os_mem_commit(u8* base, u64 size)
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{
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return base;
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}
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bool
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os_mem_decommit(u8* base, u64 size)
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{
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return 1; // true
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}
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bool
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os_mem_release(u8* base, u64 size)
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{
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free(base);
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return 1; // true
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}
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#endif // LUMENARIUM_LINUX_MEMORY_H
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