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sys/posix: add MAP_ANONYMOUS

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This commit is contained in:
Laytan Laats
2024-12-01 11:54:54 +11:00
committed by flysand7
parent 468c0b573a
commit 460e2629bd
2 changed files with 16 additions and 16 deletions
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core/mem/virtual/virtual_posix.odin
+3 -7
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@@ -6,17 +6,13 @@ import "core:sys/posix"
// Define non-posix needed flags:
when ODIN_OS == .Darwin || ODIN_OS == .FreeBSD {
MAP_ANONYMOUS :: 0x1000 /* allocated from memory, swap space */
MADV_FREE :: 5 /* pages unneeded, discard contents */
MADV_FREE :: 5 /* pages unneeded, discard contents */
} else when ODIN_OS == .OpenBSD || ODIN_OS == .NetBSD {
MAP_ANONYMOUS :: 0x1000
MADV_FREE :: 6
MADV_FREE :: 6
}
_reserve :: proc "contextless" (size: uint) -> (data: []byte, err: Allocator_Error) {
flags := posix.Map_Flags{ .PRIVATE } + transmute(posix.Map_Flags)i32(MAP_ANONYMOUS)
flags := posix.Map_Flags{ .ANONYMOUS, .PRIVATE }
result := posix.mmap(nil, size, {}, flags)
if result == posix.MAP_FAILED {
return nil, .Out_Of_Memory