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Improve synchronization

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- Fix bugs in kDos2Errno definition
- malloc() should now be thread safe
- Fix bug in rollup.com header generator
- Fix open(O_APPEND) on the New Technology
- Fix select() on the New Technology and test it
- Work towards refactoring i/o for thread safety
- Socket reads and writes on NT now poll for signals
- Work towards i/o completion ports on the New Technology
- Make read() and write() intermittently check for signals
- Blinkenlights keyboard i/o so much better on NT w/ poll()
- You can now poll() files and sockets at the same time on NT
- Fix bug in appendr() that manifests with dlmalloc footers off
This commit is contained in:
Justine Tunney 2022-04-14 23:39:48 -07:00
parent 233144b19d
commit 933411ba99
266 changed files with 8761 additions and 4344 deletions
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38
libc/calls/dup-nt.c
View file

@ -24,38 +24,62 @@
#include "libc/nt/files.h"
#include "libc/nt/runtime.h"
#include "libc/sock/internal.h"
#include "libc/sock/ntstdin.internal.h"
#include "libc/sysv/consts/o.h"
#include "libc/sysv/errfuns.h"
/**
* Implements dup(), dup2(), and dup3() for Windows NT.
* Implements dup(), dup2(), dup3(), and F_DUPFD for Windows.
*/
textwindows int sys_dup_nt(int oldfd, int newfd, int flags) {
int64_t proc;
textwindows int sys_dup_nt(int oldfd, int newfd, int flags, int start) {
int64_t proc, handle;
// validate the api usage
if (oldfd < 0) return einval();
if (flags & ~O_CLOEXEC) return einval();
if (oldfd >= g_fds.n ||
(g_fds.p[oldfd].kind != kFdFile && g_fds.p[oldfd].kind != kFdSocket &&
g_fds.p[oldfd].kind != kFdConsole)) {
return ebadf();
}
// allocate a new file descriptor
if (newfd == -1) {
if ((newfd = __reservefd()) == -1) return -1;
if ((newfd = __reservefd(start)) == -1) {
return -1;
}
} else {
if (__ensurefds(newfd) == -1) return -1;
if (g_fds.p[newfd].kind) close(newfd);
g_fds.p[newfd].kind = kFdReserved;
}
// if this file descriptor is wrapped in a named pipe worker thread
// then we should clone the original authentic handle rather than the
// stdin worker's named pipe. we won't clone the worker, since that
// can always be recreated again on demand.
if (g_fds.p[oldfd].worker) {
handle = g_fds.p[oldfd].worker->reader;
} else {
handle = g_fds.p[oldfd].handle;
}
proc = GetCurrentProcess();
if (DuplicateHandle(proc, g_fds.p[oldfd].handle, proc, &g_fds.p[newfd].handle,
0, true, kNtDuplicateSameAccess)) {
if (DuplicateHandle(proc, handle, proc, &g_fds.p[newfd].handle, 0, true,
kNtDuplicateSameAccess)) {
g_fds.p[newfd].kind = g_fds.p[oldfd].kind;
g_fds.p[newfd].flags = flags;
g_fds.p[newfd].mode = g_fds.p[oldfd].mode;
g_fds.p[newfd].flags = g_fds.p[oldfd].flags & ~O_CLOEXEC;
if (flags & O_CLOEXEC) g_fds.p[newfd].flags |= O_CLOEXEC;
if (g_fds.p[oldfd].kind == kFdSocket && weaken(_dupsockfd)) {
g_fds.p[newfd].extra =
(intptr_t)weaken(_dupsockfd)((struct SockFd *)g_fds.p[oldfd].extra);
} else {
g_fds.p[newfd].extra = g_fds.p[oldfd].extra;
}
if (g_fds.p[oldfd].worker) {
g_fds.p[newfd].worker = weaken(RefNtStdinWorker)(g_fds.p[oldfd].worker);
}
return newfd;
} else {
__releasefd(newfd);