45 lines
1.2 KiB
Plaintext
45 lines
1.2 KiB
Plaintext
#import "Windows.kl"
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#import "base.kl"
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PAGE_SIZE :: 4096
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Memory :: struct
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commit : SizeU
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reserve: SizeU
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data : *U8
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reserve :: (size: SizeU): Memory
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result := Memory{reserve=align_up(size, PAGE_SIZE)}
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result.data = VirtualAlloc(
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flProtect = PAGE_READWRITE,
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dwSize = result.reserve,
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flAllocationType = MEM_RESERVE,
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lpAddress = 0)->*U8
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return result
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commit :: (m: *Memory, size: SizeU): Bool
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commit_size := align_up(size, PAGE_SIZE)
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total_commit := m.commit + commit_size
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clamped_commit := clamp_top_sizeu(total_commit, m.reserve)
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adjusted_commit := clamped_commit - m.commit
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if adjusted_commit != 0
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result := VirtualAlloc(
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lpAddress = (m.data + m.commit)->*void,
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dwSize = adjusted_commit,
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flAllocationType = MEM_COMMIT,
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flProtect = PAGE_READWRITE,
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)
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m.commit += adjusted_commit
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return true
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return false
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release :: (m: *Memory)
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result := VirtualFree(m.data->*void, 0, MEM_RELEASE)
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if result != 0
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m.data = 0
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m.commit = 0
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m.reserve = 0
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print :: (string: String16)
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handle := GetStdHandle(STD_OUTPUT_HANDLE)
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WriteConsoleW(handle, (string.str)->*void, string.len->DWORD, 0, 0)
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