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Use union #shared_nil for os.Error

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This commit is contained in:
gingerBill
2024-08-04 11:05:30 +01:00
parent e60951a902
commit 9f9abb8fb3
18 changed files with 93 additions and 87 deletions
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core/os/os.odin
+13 -4
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@@ -1,5 +1,6 @@
package os
import "base:intrinsics"
import "base:runtime"
import "core:strconv"
import "core:unicode/utf8"
@@ -14,10 +15,18 @@ SEEK_CUR :: 1
SEEK_END :: 2
Platform_Error :: _Platform_Error
Error :: Platform_Error
Errno :: Error // alias
#assert(size_of(Platform_Error) <= 4)
#assert(intrinsics.type_has_nil(Platform_Error))
ERROR_NONE :: Errno(0)
Errno :: Error // alias for legacy use
Error :: union #shared_nil {
Platform_Error,
runtime.Allocator_Error,
}
#assert(size_of(Error) <= 8)
ERROR_NONE :: Error{}
write_string :: proc(fd: Handle, str: string) -> (int, Errno) {
return write(fd, transmute([]byte)str)
@@ -67,7 +76,7 @@ write_encoded_rune :: proc(fd: Handle, r: rune) {
read_at_least :: proc(fd: Handle, buf: []byte, min: int) -> (n: int, err: Errno) {
if len(buf) < min {
return 0, -1
return 0, Platform_Error(~intrinsics.type_core_type(Platform_Error)(0)) // TODO(bill): replace this error
}
nn := max(int)
for nn > 0 && n < min && err == 0 {