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Add comment about compiletime check.

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Signed-off-by: Takeshi Yoneda <takeshi@tetrate.io>
This commit is contained in:
Takeshi Yoneda 2021-08-13 21:54:18 +09:00
parent ca4898c0f3
commit 68617c9fb0
1 changed files with 5 additions and 1 deletions
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6
lib/std/fs.zig
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@ -937,6 +937,8 @@ pub const Dir = struct {
try os.openatZ(self.fd, sub_path, os_flags, 0);
errdefer os.close(fd);
// WASI doesn't have os.flock so we intetinally check OS prior to the inner if block
// since it is not compiltime-known and we need to avoid undefined symbol in Wasm.
if (builtin.target.os.tag != .wasi) {
if (!has_flock_open_flags and flags.lock != .None) {
// TODO: integrate async I/O
@ -1089,8 +1091,10 @@ pub const Dir = struct {
try os.openatZ(self.fd, sub_path_c, os_flags, flags.mode);
errdefer os.close(fd);
// WASI doesn't have os.flock so we intetinally check OS prior to the inner if block
// since it is not compiltime-known and we need to avoid undefined symbol in Wasm.
if (builtin.target.os.tag != .wasi) {
if (!has_flock_open_flags and flags.lock != .None and builtin.target.os.tag != .wasi) {
if (!has_flock_open_flags and flags.lock != .None) {
// TODO: integrate async I/O
const lock_nonblocking = if (flags.lock_nonblocking) os.LOCK_NB else @as(i32, 0);
try os.flock(fd, switch (flags.lock) {