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mem/virtual: support the BSDs

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This commit is contained in:
Laytan Laats
2024-08-01 22:17:10 +02:00
parent 379cd6fe66
commit 7c9ca60ff0
2 changed files with 14 additions and 6 deletions
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3
core/mem/virtual/virtual_other.odin
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@@ -1,5 +1,8 @@
//+private
//+build !darwin
//+build !freebsd
//+build !openbsd
//+build !netbsd
//+build !linux
//+build !windows
package mem_virtual

17
core/mem/virtual/virtual_darwin.odin → core/mem/virtual/virtual_posix.odin
View File

@@ -1,12 +1,19 @@
//+build darwin
//+build darwin, netbsd, freebsd, openbsd
//+private
package mem_virtual
import "core:sys/posix"
MAP_ANONYMOUS :: 0x1000 /* allocated from memory, swap space */
// 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
}
_reserve :: proc "contextless" (size: uint) -> (data: []byte, err: Allocator_Error) {
flags := posix.Map_Flags{ .PRIVATE } + transmute(posix.Map_Flags)i32(MAP_ANONYMOUS)
@@ -43,15 +50,13 @@ _protect :: proc "contextless" (data: rawptr, size: uint, flags: Protect_Flags)
return posix.mprotect(data, size, transmute(posix.Prot_Flags)flags) == .OK
}
_platform_memory_init :: proc() {
DEFAULT_PAGE_SIZE = 4096
DEFAULT_PAGE_SIZE = posix.PAGE_SIZE
// is power of two
assert(DEFAULT_PAGE_SIZE != 0 && (DEFAULT_PAGE_SIZE & (DEFAULT_PAGE_SIZE-1)) == 0)
}
_map_file :: proc "contextless" (fd: uintptr, size: i64, flags: Map_File_Flags) -> (data: []byte, error: Map_File_Error) {
#assert(i32(posix.Prot_Flag_Bits.READ) == i32(Map_File_Flag.Read))
#assert(i32(posix.Prot_Flag_Bits.WRITE) == i32(Map_File_Flag.Write))