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unix,fs: make no_pwritev access thread-safe (#4066)

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Santiago Gimeno 2023-06-23 13:17:37 +02:00 committed by GitHub
parent ca544ed6fc
commit c8fad2ac09
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 3 additions and 3 deletions
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6
src/unix/fs.c
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@ -1157,7 +1157,7 @@ static ssize_t uv__fs_lutime(uv_fs_t* req) {
static ssize_t uv__fs_write(uv_fs_t* req) {
#if defined(__linux__)
static int no_pwritev;
static _Atomic int no_pwritev;
#endif
ssize_t r;
@ -1186,7 +1186,7 @@ static ssize_t uv__fs_write(uv_fs_t* req) {
r = pwritev(req->file, (struct iovec*) req->bufs, req->nbufs, req->off);
#else
# if defined(__linux__)
if (no_pwritev) retry:
if (atomic_load_explicit(&no_pwritev, memory_order_relaxed)) retry:
# endif
{
r = pwrite(req->file, req->bufs[0].base, req->bufs[0].len, req->off);
@ -1198,7 +1198,7 @@ static ssize_t uv__fs_write(uv_fs_t* req) {
req->nbufs,
req->off);
if (r == -1 && errno == ENOSYS) {
no_pwritev = 1;
atomic_store_explicit(&no_pwritev, 1, memory_order_relaxed);
goto retry;
}
}