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https://github.com/jart/cosmopolitan.git
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e557058ac8
This change addresses various open source compatibility issues, so that we pass 313/411 of the tests in https://github.com/jart/libc-test where earlier today we were passing about 30/411 of them, due to header toil. Please note that Glibc only passes 341/411 so 313 today is pretty good! - Make the conformance of libc/isystem/ headers nearly perfect - Import more of the remaining math library routines from Musl - Fix inconsistencies with type signatures of calls like umask - Write tests for getpriority/setpriority which work great now - conform to `struct sockaddr *` on remaining socket functions - Import a bunch of uninteresting stdlib functions e.g. rand48 - Introduce readdir_r, scandir, pthread_kill, sigsetjmp, etc.. Follow the instructions in our `tool/scripts/cosmocc` toolchain to run these tests yourself. You use `make CC=cosmocc` on the test repository
67 lines
3.5 KiB
C
67 lines
3.5 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2022 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/intrin/kprintf.h"
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#include "libc/runtime/runtime.h"
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#include "libc/thread/thread.h"
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/**
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* Cancels thread.
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*
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* This function currently isn't supported. In order to support this
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* function we'd need to redesign the system call interface, and add
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* bloat and complexity to every function that can return EINTR. You
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* might want to consider using `nsync_note` instead, which provides
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* much better cancellations because posix cancellations is a broken
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* design. If you need to cancel i/o operations, try doing this:
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*
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* _Thread_local bool gotusr1;
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* void OnUsr1(int sig) { gotusr1 = true; }
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* struct sigaction sa = {.sa_handler = OnUsr1};
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* sigaction(SIGUSR1, &sa, 0);
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* pthread_kill(thread, SIGUSR1);
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*
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* The above code should successfully cancel a thread's blocking io
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* operations in most cases, e.g.
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*
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* void *MyThread(void *arg) {
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* sigset_t ss;
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* sigfillset(&ss);
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* sigdelset(&ss, SIGUSR1);
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* sigprocmask(SIG_SETMASK, &ss, 0);
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* while (!gotusr1) {
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* char buf[512];
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* ssize_t rc = read(0, buf, sizeof(buf));
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* if (rc == -1 && errno == EINTR) continue;
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* write(1, buf, rc);
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* }
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* return 0;
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* }
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*
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* This has the same correctness issue as glibc, but it's usually
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* "good enough" if you only need cancellations to perform things
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* like server shutdown and socket options like `SO_RCVTIMEO` can
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* ensure it's even safer, since it can't possibly block forever.
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*
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* @see https://sourceware.org/bugzilla/show_bug.cgi?id=12683
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*/
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int pthread_cancel(pthread_t thread) {
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kprintf("error: pthread_cancel() isn't supported, please see the"
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" cosmopolitan libc documentation for further details\n");
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_Exit(1);
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}
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