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unix: fix build for lower versions of Android (#4046)

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Available since Android N (API level 24): getgrgid_r, preadv, pwritev

Refs: https://cs.android.com/android/platform/superproject/+/master:bionic/docs/status.md
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小明 2023-06-26 19:47:48 +08:00 committed by GitHub
parent c8fad2ac09
commit 7b43d70be4
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2 changed files with 16 additions and 6 deletions
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5
src/unix/core.c
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@ -1271,6 +1271,10 @@ static int uv__getpwuid_r(uv_passwd_t *pwd, uid_t uid) {
int uv_os_get_group(uv_group_t* grp, uv_uid_t gid) {
#if defined(__ANDROID__) && __ANDROID_API__ < 24
/* This function getgrgid_r() was added in Android N (level 24) */
return UV_ENOSYS;
#else
struct group gp;
struct group* result;
char* buf;
@ -1347,6 +1351,7 @@ int uv_os_get_group(uv_group_t* grp, uv_uid_t gid) {
uv__free(buf);
return 0;
#endif
}

17
src/unix/fs.c
View File

@ -55,6 +55,11 @@
# define HAVE_PREADV 0
#endif
/* preadv() and pwritev() were added in Android N (level 24) */
#if defined(__linux__) && !(defined(__ANDROID__) && __ANDROID_API__ < 24)
# define TRY_PREADV 1
#endif
#if defined(__linux__)
# include <sys/sendfile.h>
#endif
@ -456,7 +461,7 @@ static ssize_t uv__fs_preadv(uv_file fd,
static ssize_t uv__fs_read(uv_fs_t* req) {
#if defined(__linux__)
#if TRY_PREADV
static _Atomic int no_preadv;
#endif
unsigned int iovmax;
@ -480,13 +485,13 @@ static ssize_t uv__fs_read(uv_fs_t* req) {
#if HAVE_PREADV
result = preadv(req->file, (struct iovec*) req->bufs, req->nbufs, req->off);
#else
# if defined(__linux__)
# if TRY_PREADV
if (atomic_load_explicit(&no_preadv, memory_order_relaxed)) retry:
# endif
{
result = uv__fs_preadv(req->file, req->bufs, req->nbufs, req->off);
}
# if defined(__linux__)
# if TRY_PREADV
else {
result = preadv(req->file,
(struct iovec*) req->bufs,
@ -1156,7 +1161,7 @@ static ssize_t uv__fs_lutime(uv_fs_t* req) {
static ssize_t uv__fs_write(uv_fs_t* req) {
#if defined(__linux__)
#if TRY_PREADV
static _Atomic int no_pwritev;
#endif
ssize_t r;
@ -1185,13 +1190,13 @@ static ssize_t uv__fs_write(uv_fs_t* req) {
#if HAVE_PREADV
r = pwritev(req->file, (struct iovec*) req->bufs, req->nbufs, req->off);
#else
# if defined(__linux__)
# if TRY_PREADV
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);
}
# if defined(__linux__)
# if TRY_PREADV
else {
r = pwritev(req->file,
(struct iovec*) req->bufs,