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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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46
libc/calls/fcntl-nt.c
View file

@ -20,7 +20,9 @@
#include "libc/calls/internal.h"
#include "libc/calls/struct/flock.h"
#include "libc/intrin/cmpxchg.h"
#include "libc/intrin/kprintf.h"
#include "libc/macros.internal.h"
#include "libc/nt/createfile.h"
#include "libc/nt/enum/accessmask.h"
#include "libc/nt/enum/fileflagandattributes.h"
#include "libc/nt/enum/filelockflags.h"
@ -38,38 +40,8 @@
#include "libc/sysv/consts/o.h"
#include "libc/sysv/errfuns.h"
static textwindows int sys_fcntl_nt_reservefd(int start) {
int fd;
for (;;) {
fd = start;
if (fd >= g_fds.n) {
if (__ensurefds(fd) == -1) return -1;
}
_cmpxchg(&g_fds.f, fd, fd + 1);
if (_cmpxchg(&g_fds.p[fd].kind, kFdEmpty, kFdReserved)) {
return fd;
}
}
}
static textwindows int sys_fcntl_nt_dupfd(int oldfd, int cmd, int start) {
int newfd;
int64_t proc;
if ((newfd = sys_fcntl_nt_reservefd(start)) != -1) {
proc = GetCurrentProcess();
if (DuplicateHandle(proc, g_fds.p[oldfd].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 = cmd == F_DUPFD_CLOEXEC ? O_CLOEXEC : 0;
return newfd;
} else {
__releasefd(newfd);
return __winerr();
}
} else {
return -1;
}
static textwindows int sys_fcntl_nt_dupfd(int fd, int cmd, int start) {
return sys_dup_nt(fd, -1, (cmd == F_DUPFD_CLOEXEC ? O_CLOEXEC : 0), start);
}
static textwindows int sys_fcntl_nt_lock(struct Fd *f, int cmd, uintptr_t arg) {
@ -98,7 +70,7 @@ static textwindows int sys_fcntl_nt_lock(struct Fd *f, int cmd, uintptr_t arg) {
}
if (!len) len = size - off;
if (off < 0 || len < 0) return einval();
_offset2overlap(off, &ov);
_offset2overlap(f->handle, off, &ov);
if (l->l_type == F_RDLCK || l->l_type == F_WRLCK) {
flags = 0;
if (cmd == F_SETLK) flags |= kNtLockfileFailImmediately;
@ -136,11 +108,9 @@ textwindows int sys_fcntl_nt(int fd, int cmd, uintptr_t arg) {
return g_fds.p[fd].flags & (O_ACCMODE | O_APPEND | O_ASYNC | O_DIRECT |
O_NOATIME | O_NONBLOCK);
} else if (cmd == F_SETFL) {
/*
* - O_APPEND doesn't appear to be tunable at cursory glance
* - O_NONBLOCK might require we start doing all i/o in threads
* - O_DSYNC / O_RSYNC / O_SYNC maybe if we fsync() everything
*/
// O_APPEND doesn't appear to be tunable at cursory glance
// O_NONBLOCK might require we start doing all i/o in threads
// O_DSYNC / O_RSYNC / O_SYNC maybe if we fsync() everything
return einval();
} else if (cmd == F_GETFD) {
if (g_fds.p[fd].flags & O_CLOEXEC) {