Make more Windows socket fixes and improvements

This change makes send() / sendto() always block on Windows. It's needed
because poll(POLLOUT) doesn't guarantee a socket is immediately writable
on Windows, and it caused rsync to fail because it made that assumption.
The only exception is when a SO_SNDTIMEO is specified which will EAGAIN.

Tests are added confirming MSG_WAITALL and MSG_NOSIGNAL work as expected
on all our supported OSes. Most of the platform-specific MSG_FOO magnums
have been deleted, with the exception of MSG_FASTOPEN. Your --strace log
will now show MSG_FOO flags as symbols rather than numbers.

I've also removed cv_wait_example_test because it's 0.3% flaky with Qemu
under system load since it depends on a process being readily scheduled.
This commit is contained in:
Justine Tunney 2024-09-18 19:54:56 -07:00
parent ce2fbf9325
commit 87a6669900
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
41 changed files with 584 additions and 184 deletions

View file

@ -2,41 +2,18 @@
#define COSMOPOLITAN_LIBC_SYSV_CONSTS_MSG_H_
COSMOPOLITAN_C_START_
extern const int MSG_BATCH;
extern const int MSG_BCAST;
extern const int MSG_CMSG_CLOEXEC;
extern const int MSG_CONFIRM;
extern const int MSG_CTRUNC;
extern const int MSG_DONTROUTE;
extern const int MSG_DONTWAIT;
extern const int MSG_EOF;
extern const int MSG_EOR;
extern const int MSG_ERRQUEUE;
extern const int MSG_EXCEPT;
extern const int MSG_FASTOPEN;
extern const int MSG_FIN;
extern const int MSG_INFO;
extern const int MSG_MCAST;
extern const int MSG_MORE;
extern const int MSG_NOERROR;
extern const int MSG_NOSIGNAL;
extern const int MSG_NOTIFICATION;
extern const int MSG_OOB;
extern const int MSG_PARITY_ERROR;
extern const int MSG_PEEK;
extern const int MSG_PROXY;
extern const int MSG_RST;
extern const int MSG_STAT;
extern const int MSG_SYN;
extern const int MSG_TRUNC;
extern const int MSG_WAITALL;
extern const int MSG_WAITFORONE;
extern const int MSG_NOSIGNAL;
extern const int MSG_TRUNC;
extern const int MSG_CTRUNC;
extern const int MSG_FASTOPEN; /* linux only */
#define MSG_OOB 1
#define MSG_PEEK 2
#define MSG_DONTROUTE 4
#define MSG_DONTWAIT MSG_DONTWAIT
#define MSG_FASTOPEN MSG_FASTOPEN
#define MSG_NOSIGNAL MSG_NOSIGNAL
#define MSG_WAITALL MSG_WAITALL
#define MSG_TRUNC MSG_TRUNC
#define MSG_CTRUNC MSG_CTRUNC