147 lines
5 KiB
C
147 lines
5 KiB
C
/* ath.h - Thread-safeness library.
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Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
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This file is part of Libgcrypt.
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Libgcrypt is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of
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the License, or (at your option) any later version.
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Libgcrypt is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with Libgcrypt; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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#ifndef ATH_H
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#define ATH_H
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#include <config.h>
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#ifdef _WIN32
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# include <windows.h>
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#else /* !_WIN32 */
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# ifdef HAVE_SYS_SELECT_H
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# include <sys/select.h>
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# else
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# include <sys/time.h>
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# endif
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# include <sys/types.h>
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# ifdef HAVE_SYS_MSG_H
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# include <sys/msg.h> /* (e.g. for zOS) */
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# endif
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# include <sys/socket.h>
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#endif /* !_WIN32 */
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#include <gpg-error.h>
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/* Define _ATH_EXT_SYM_PREFIX if you want to give all external symbols
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a prefix. */
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#define _ATH_EXT_SYM_PREFIX _gcry_
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#ifdef _ATH_EXT_SYM_PREFIX
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#define _ATH_PREFIX1(x,y) x ## y
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#define _ATH_PREFIX2(x,y) _ATH_PREFIX1(x,y)
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#define _ATH_PREFIX(x) _ATH_PREFIX2(_ATH_EXT_SYM_PREFIX,x)
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#define ath_install _ATH_PREFIX(ath_install)
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#define ath_init _ATH_PREFIX(ath_init)
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#define ath_mutex_init _ATH_PREFIX(ath_mutex_init)
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#define ath_mutex_destroy _ATH_PREFIX(ath_mutex_destroy)
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#define ath_mutex_lock _ATH_PREFIX(ath_mutex_lock)
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#define ath_mutex_unlock _ATH_PREFIX(ath_mutex_unlock)
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#define ath_read _ATH_PREFIX(ath_read)
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#define ath_write _ATH_PREFIX(ath_write)
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#define ath_select _ATH_PREFIX(ath_select)
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#define ath_waitpid _ATH_PREFIX(ath_waitpid)
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#define ath_connect _ATH_PREFIX(ath_connect)
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#define ath_accept _ATH_PREFIX(ath_accept)
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#define ath_sendmsg _ATH_PREFIX(ath_sendmsg)
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#define ath_recvmsg _ATH_PREFIX(ath_recvmsg)
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#endif
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enum ath_thread_option
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{
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ATH_THREAD_OPTION_DEFAULT = 0,
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ATH_THREAD_OPTION_USER = 1,
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ATH_THREAD_OPTION_PTH = 2,
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ATH_THREAD_OPTION_PTHREAD = 3
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};
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struct ath_ops
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{
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/* The OPTION field encodes the thread model and the version number
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of this structure.
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Bits 7 - 0 are used for the thread model
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Bits 15 - 8 are used for the version number.
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*/
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unsigned int option;
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int (*init) (void);
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int (*mutex_init) (void **priv);
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int (*mutex_destroy) (void *priv);
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int (*mutex_lock) (void *priv);
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int (*mutex_unlock) (void *priv);
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ssize_t (*read) (int fd, void *buf, size_t nbytes);
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ssize_t (*write) (int fd, const void *buf, size_t nbytes);
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#ifdef _WIN32
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ssize_t (*select) (int nfd, void *rset, void *wset, void *eset,
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struct timeval *timeout);
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ssize_t (*waitpid) (pid_t pid, int *status, int options);
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int (*accept) (int s, void *addr, int *length_ptr);
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int (*connect) (int s, void *addr, int length);
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int (*sendmsg) (int s, const void *msg, int flags);
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int (*recvmsg) (int s, void *msg, int flags);
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#else
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ssize_t (*select) (int nfd, fd_set *rset, fd_set *wset, fd_set *eset,
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struct timeval *timeout);
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ssize_t (*waitpid) (pid_t pid, int *status, int options);
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int (*accept) (int s, struct sockaddr *addr, socklen_t *length_ptr);
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int (*connect) (int s, struct sockaddr *addr, socklen_t length);
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int (*sendmsg) (int s, const struct msghdr *msg, int flags);
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int (*recvmsg) (int s, struct msghdr *msg, int flags);
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#endif
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};
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gpg_err_code_t ath_install (struct ath_ops *ath_ops, int check_only);
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int ath_init (void);
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/* Functions for mutual exclusion. */
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typedef void *ath_mutex_t;
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#define ATH_MUTEX_INITIALIZER 0
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int ath_mutex_init (ath_mutex_t *mutex);
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int ath_mutex_destroy (ath_mutex_t *mutex);
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int ath_mutex_lock (ath_mutex_t *mutex);
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int ath_mutex_unlock (ath_mutex_t *mutex);
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/* Replacement for the POSIX functions, which can be used to allow
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other (user-level) threads to run. */
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ssize_t ath_read (int fd, void *buf, size_t nbytes);
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ssize_t ath_write (int fd, const void *buf, size_t nbytes);
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#ifdef _WIN32
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ssize_t ath_select (int nfd, void *rset, void *wset, void *eset,
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struct timeval *timeout);
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ssize_t ath_waitpid (pid_t pid, int *status, int options);
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int ath_accept (int s, void *addr, int *length_ptr);
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int ath_connect (int s, void *addr, int length);
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int ath_sendmsg (int s, const void *msg, int flags);
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int ath_recvmsg (int s, void *msg, int flags);
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#else
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ssize_t ath_select (int nfd, fd_set *rset, fd_set *wset, fd_set *eset,
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struct timeval *timeout);
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ssize_t ath_waitpid (pid_t pid, int *status, int options);
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int ath_accept (int s, struct sockaddr *addr, socklen_t *length_ptr);
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int ath_connect (int s, struct sockaddr *addr, socklen_t length);
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int ath_sendmsg (int s, const struct msghdr *msg, int flags);
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int ath_recvmsg (int s, struct msghdr *msg, int flags);
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#endif
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#endif /* ATH_H */
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