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https://github.com/jart/cosmopolitan.git
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a359de7893
This changes *NSYNC to allocate waiters on the stack so our locks don't need to depend on dynamic memory. This make our runtiem simpler, and it also fixes bugs with thread cancellation support.
45 lines
2.3 KiB
C
45 lines
2.3 KiB
C
/*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8 -*-│
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│vi: set et ft=c ts=8 tw=8 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2016 Google Inc. │
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│ │
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│ Licensed under the Apache License, Version 2.0 (the "License"); │
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│ you may not use this file except in compliance with the License. │
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│ You may obtain a copy of the License at │
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│ │
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│ http://www.apache.org/licenses/LICENSE-2.0 │
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│ │
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│ Unless required by applicable law or agreed to in writing, software │
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│ distributed under the License is distributed on an "AS IS" BASIS, │
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│ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. │
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│ See the License for the specific language governing permissions and │
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│ limitations under the License. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "third_party/nsync/testing/smprintf.h"
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#include "libc/mem/mem.h"
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#include "libc/stdio/stdio.h"
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#include "libc/str/str.h"
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// clang-format off
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char *smprintf (const char *fmt, ...) {
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int m = strlen (fmt) * 2 + 1;
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char *buf = (char *) malloc (m);
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int didnt_fit;
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do {
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va_list ap;
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int x;
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va_start (ap, fmt);
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x = vsnprintf (buf, m, fmt, ap);
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va_end (ap);
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if (x >= m) {
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buf = (char *) realloc (buf, m = x+1);
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didnt_fit = 1;
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} else if (x < 0 || x == m-1) {
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buf = (char *) realloc (buf, m *= 2);
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didnt_fit = 1;
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} else {
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didnt_fit = 0;
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}
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} while (didnt_fit);
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return (buf);
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}
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