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casify syscall and sequelae

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R=rsc
DELTA=337  (0 added, 1 deleted, 336 changed)
OCL=22950
CL=22950
This commit is contained in:
Rob Pike 2009-01-16 11:36:44 -08:00
parent 5d41f55acc
commit 1a91b9a8a9
21 changed files with 298 additions and 299 deletions
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17
src/lib/os/os_error.go
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@ -15,11 +15,11 @@ export type Error struct {
// Indexed by errno.
// If we worry about syscall speed (only relevant on failure), we could
// make it an array, but it's probably not important.
var ErrorTab = make(map[int64] *Error);
var errorTab = make(map[int64] *Error);
// Table of all known errors in system. Use the same error string twice,
// get the same *os.Error.
var ErrorStringTab = make(map[string] *Error);
var errorStringTab = make(map[string] *Error);
// These functions contain a race if two goroutines add identical
// errors simultaneously but the consequences are unimportant.
@ -29,12 +29,12 @@ export func NewError(s string) *Error {
if s == "" {
return nil
}
err, ok := ErrorStringTab[s];
err, ok := errorStringTab[s];
if ok {
return err
}
err = &Error{s};
ErrorStringTab[s] = err;
errorStringTab[s] = err;
return err;
}
@ -44,12 +44,12 @@ export func ErrnoToError(errno int64) *Error {
return nil
}
// Quick lookup by errno.
err, ok := ErrorTab[errno];
err, ok := errorTab[errno];
if ok {
return err
}
err = NewError(syscall.errstr(errno));
ErrorTab[errno] = err;
err = NewError(syscall.Errstr(errno));
errorTab[errno] = err;
return err;
}
@ -91,11 +91,10 @@ export var (
ERANGE = ErrnoToError(syscall.ERANGE);
EAGAIN = ErrnoToError(syscall.EAGAIN);
)
const NoError = "No Error"
func (e *Error) String() string {
if e == nil {
return NoError
return "No Error"
}
return e.s
}