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Improve threading support further

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This commit is contained in:
Justine Tunney 2022-05-17 04:14:28 -07:00
parent 8bfb70ca3f
commit ce71677156
61 changed files with 882 additions and 747 deletions
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28
libc/calls/dup-nt.c
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@ -20,6 +20,7 @@
#include "libc/bits/weaken.h"
#include "libc/calls/calls.h"
#include "libc/calls/internal.h"
#include "libc/intrin/spinlock.h"
#include "libc/mem/mem.h"
#include "libc/nt/files.h"
#include "libc/nt/runtime.h"
@ -32,25 +33,37 @@
* Implements dup(), dup2(), dup3(), and F_DUPFD for Windows.
*/
textwindows int sys_dup_nt(int oldfd, int newfd, int flags, int start) {
int64_t proc, handle;
int64_t rc, proc, handle;
// validate the api usage
if (oldfd < 0) return einval();
if (flags & ~O_CLOEXEC) return einval();
_spinlock(&__fds_lock);
if (oldfd >= g_fds.n ||
(g_fds.p[oldfd].kind != kFdFile && g_fds.p[oldfd].kind != kFdSocket &&
g_fds.p[oldfd].kind != kFdConsole)) {
_spunlock(&__fds_lock);
return ebadf();
}
// allocate a new file descriptor
if (newfd == -1) {
if ((newfd = __reservefd(start)) == -1) {
if ((newfd = __reservefd_unlocked(start)) == -1) {
_spunlock(&__fds_lock);
return -1;
}
} else {
if (__ensurefds(newfd) == -1) return -1;
if (g_fds.p[newfd].kind) close(newfd);
if (__ensurefds_unlocked(newfd) == -1) {
_spunlock(&__fds_lock);
return -1;
}
if (g_fds.p[newfd].kind) {
_spunlock(&__fds_lock);
close(newfd);
_spinlock(&__fds_lock);
}
g_fds.p[newfd].kind = kFdReserved;
}
@ -80,9 +93,12 @@ textwindows int sys_dup_nt(int oldfd, int newfd, int flags, int start) {
if (g_fds.p[oldfd].worker) {
g_fds.p[newfd].worker = weaken(RefNtStdinWorker)(g_fds.p[oldfd].worker);
}
return newfd;
rc = newfd;
} else {
__releasefd(newfd);
return __winerr();
rc = __winerr();
}
_spunlock(&__fds_lock);
return rc;
}