Work towards improving signals and processes

libc/runtime/pthread.c

@@ -0,0 +1,50 @@
+/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
+│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
+╞══════════════════════════════════════════════════════════════════════════════╡
+│ Copyright 2021 Justine Alexandra Roberts Tunney                              │
+│                                                                              │
+│ Permission to use, copy, modify, and/or distribute this software for         │
+│ any purpose with or without fee is hereby granted, provided that the         │
+│ above copyright notice and this permission notice appear in all copies.      │
+│                                                                              │
+│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
+│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
+│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
+│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
+│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
+│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
+│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
+│ PERFORMANCE OF THIS SOFTWARE.                                                │
+╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/bits/bits.h"
+#include "libc/errno.h"
+#include "libc/runtime/runtime.h"
+
+typedef void *pthread_t;
+typedef bool pthread_once_t;
+typedef int pthread_mutex_t;
+
+int pthread_once(pthread_once_t *once, void init(void)) {
+  if (lockcmpxchg(once, 0, 1)) init();
+  return 0;
+}
+
+int pthread_mutex_lock(pthread_mutex_t *mutex) {
+  return EINVAL;
+}
+
+int pthread_mutex_trylock(pthread_mutex_t *mutex) {
+  return EINVAL;
+}
+
+int pthread_mutex_unlock(pthread_mutex_t *mutex) {
+  return EPERM;
+}
+
+int pthread_cancel(pthread_t thread) {
+  return ESRCH;
+}
+
+void *__tls_get_addr(size_t v[2]) {
+  return NULL;
+}