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Put more thought into i/o polyfills

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wait4() is now solid enough to run `make -j100` on Windows. You can now
use MSG_DONTWAIT on Windows. There was a handle leak in accept() that's
been fixed. Our WIN32 overlapped i/o code has been simplified. Priority
class now inherits into subprocesses, so the verynice command will work
and the signal mask will now be inherited by execve() and posix_spawn()
This commit is contained in:
Justine Tunney 2023-11-06 16:38:44 -08:00
parent 736fdb757a
commit e961385e55
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GPG key ID: BE714B4575D6E328
52 changed files with 679 additions and 487 deletions
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12
libc/sock/recvfrom.c
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@ -34,15 +34,15 @@
/**
* Receives data from network.
*
* This function blocks unless MSG_DONTWAIT is passed. In that case, the
* non-error EWOULDBLOCK might be returned. It basically means we didn't
* wait around to learn an amount of bytes were written that we know in
* advance are guaranteed to be atomic.
*
* @param fd is the file descriptor returned by socket()
* @param buf is where received network data gets copied
* @param size is the byte capacity of buf
* @param flags is a bitmask which may contain any of the following:
* - `MSG_DONTWAIT` to force `O_NONBLOCK` behavior for this call
* - `MSG_OOB` is broadly supported (untested by cosmo)
* - `MSG_PEEK` is broadly supported (untested by cosmo)
* - `MSG_WAITALL` is broadly supported (untested by cosmo)
* - `MSG_DONTROUTE` is broadly supported (untested by cosmo)
* @param flags can have `MSG_OOB`, `MSG_PEEK`, and `MSG_DONTWAIT`
* @param opt_out_srcaddr receives the binary ip:port of the data's origin
* @param opt_inout_srcaddrsize is srcaddr capacity which gets updated
* @return number of bytes received, 0 on remote close, or -1 w/ errno