1 /* 2 * Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the OpenSSL license (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 31 typedef struct async_fibre_st { 32 ucontext_t fibre; 33 jmp_buf env; 34 int env_init; 35 } async_fibre; 36 async_fibre_swapcontext(async_fibre * o,async_fibre * n,int r)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 53 int async_fibre_makecontext(async_fibre *fibre); 54 void async_fibre_free(async_fibre *fibre); 55 56 # endif 57 #endif 58 #endif /* OSSL_CRYPTO_ASYNC_POSIX_H */ 59