1/*
2 * Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#ifndef OSSL_CRYPTO_ASYNC_POSIX_H
11#define OSSL_CRYPTO_ASYNC_POSIX_H
12#include <openssl/e_os2.h>
13
14#if defined(OPENSSL_SYS_UNIX) \
15 && defined(OPENSSL_THREADS) && !defined(OPENSSL_NO_ASYNC) \
16 && !defined(__ANDROID__) && !defined(__OpenBSD__)
17
18# include <unistd.h>
19
20# if _POSIX_VERSION >= 200112L \
21 && (_POSIX_VERSION < 200809L || defined(__GLIBC__))
22
23# include <pthread.h>
24
25# define ASYNC_POSIX
26# define ASYNC_ARCH
27
28# include <ucontext.h>
29# include <setjmp.h>
30
31typedef struct async_fibre_st {
32 ucontext_t fibre;
33 jmp_buf env;
34 int env_init;
35} async_fibre;
36
37static ossl_inline int async_fibre_swapcontext(async_fibre *o, async_fibre *n, int r)
38{
39 o->env_init = 1;
40
41 if (!r || !_setjmp(o->env)) {
42 if (n->env_init)
43 _longjmp(n->env, 1);
44 else
45 setcontext(&n->fibre);
46 }
47
48 return 1;
49}
50
51# define async_fibre_init_dispatcher(d)
52
53int async_fibre_makecontext(async_fibre *fibre);
54void async_fibre_free(async_fibre *fibre);
55
56# endif
57#endif
58#endif /* OSSL_CRYPTO_ASYNC_POSIX_H */
59