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Use *NSYNC for POSIX threads locking APIs

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Condition variables, barriers, and r/w locks now work very well.
This commit is contained in:
Justine Tunney 2022-09-11 11:02:07 -07:00
parent 3de35e196c
commit b5cb71ab84
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197 changed files with 3734 additions and 3817 deletions
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49
third_party/nsync/malloc.c vendored Normal file
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/*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8 -*-│
│vi: set et ft=c ts=8 tw=8 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2022 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/atomic.h"
#include "libc/calls/extend.internal.h"
#include "libc/intrin/atomic.h"
#include "libc/macros.internal.h"
#include "third_party/nsync/common.internal.h"
#include "third_party/nsync/malloc.internal.h"
// clang-format off
static char *nsync_malloc_endptr_;
static size_t nsync_malloc_total_;
static atomic_char nsync_malloc_lock_;
/* nsync_malloc_() is a malloc-like routine used by mutex and condition
variable code to allocate waiter structs. This allows *NSYNC mutexes
to be used by malloc(), by providing another, simpler allocator here.
The intent is that the implicit NULL value here can be overridden by
a client declaration that uses an initializer. */
void *nsync_malloc_ (size_t size) {
char *start;
size_t offset;
size = ROUNDUP (size, __BIGGEST_ALIGNMENT__);
while (atomic_exchange (&nsync_malloc_lock_, 1)) nsync_yield_ ();
offset = nsync_malloc_total_;
nsync_malloc_total_ += size;
start = (char *) 0x6fc000040000;
if (!nsync_malloc_endptr_) nsync_malloc_endptr_ = start;
nsync_malloc_endptr_ = _extend (start, nsync_malloc_total_,
nsync_malloc_endptr_, 0x6fcfffff0000);
atomic_store_explicit (&nsync_malloc_lock_, 0, memory_order_relaxed);
return start + offset;
}