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| Current File : //usr/src/contrib/ngatm/libngatm/sscopcust.h |
/*
* Copyright (c) 2001-2003
* Fraunhofer Institute for Open Communication Systems (FhG Fokus).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Author: Hartmut Brandt <harti@freebsd.org>
*
* $Begemot: libunimsg/libngatm/sscopcust.h,v 1.4 2004/07/08 08:21:40 brandt Exp $
*
* Customisation of the SSCOP code for the user space library.
*/
#include <sys/types.h>
#include <sys/queue.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <errno.h>
#ifdef SSCOP_DEBUG
#include <assert.h>
#endif
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netnatm/unimsg.h>
/*
* Allocate zeroed or non-zeroed memory of some size and cast it.
* Return NULL on failure.
*/
#define MEMINIT()
#define MEMZALLOC(PTR,CAST,SIZE) do { \
void *_m = malloc(SIZE); \
if (_m != NULL) \
bzero(_m, SIZE); \
(PTR) = (CAST)_m; \
} while(0)
#define MEMFREE(PTR) free(PTR);
#define MSG_ALLOC(PTR) \
MEMZALLOC(PTR, struct sscop_msg *, sizeof(struct sscop_msg))
#define MSG_FREE(PTR) \
MEMFREE(PTR)
#define SIG_ALLOC(PTR) \
MEMZALLOC(PTR, struct sscop_sig *, sizeof(struct sscop_sig))
#define SIG_FREE(PTR) \
MEMFREE(PTR)
/*
* Timer support.
*/
typedef void *sscop_timer_t;
#define TIMER_INIT(S,T) (S)->t_##T = NULL
#define TIMER_STOP(S,T) do { \
if ((S)->t_##T != NULL) { \
(S)->funcs->stop_timer((S), (S)->aarg, (S)->t_##T); \
(S)->t_##T = NULL; \
} \
} while(0)
#define TIMER_RESTART(S,T) do { \
if ((S)->t_##T != NULL) \
(S)->funcs->stop_timer((S), (S)->aarg, (S)->t_##T); \
(S)->t_##T = (S)->funcs->start_timer((S), (S)->aarg, \
(S)->timer##T, T##_func); \
} while(0)
#define TIMER_ISACT(S,T) ((S)->t_##T != NULL)
#define TIMER_FUNC(T,N) \
static void \
T##_func(void *varg) \
{ \
struct sscop *sscop = varg; \
VERBOSE(sscop, SSCOP_DBG_TIMER, (sscop, sscop->aarg, \
"timer_" #T " expired")); \
sscop->t_##T = NULL; \
sscop_signal(sscop, SIG_T_##N, NULL); \
}
/*
* Message queues
*/
typedef TAILQ_ENTRY(sscop_msg) sscop_msgq_link_t;
typedef TAILQ_HEAD(sscop_msgq, sscop_msg) sscop_msgq_head_t;
#define MSGQ_EMPTY(Q) TAILQ_EMPTY(Q)
#define MSGQ_INIT(Q) TAILQ_INIT(Q)
#define MSGQ_FOREACH(P,Q) TAILQ_FOREACH(P,Q,link)
#define MSGQ_REMOVE(Q,M) TAILQ_REMOVE(Q,M,link)
#define MSGQ_INSERT_BEFORE(B,M) TAILQ_INSERT_BEFORE(B,M,link)
#define MSGQ_APPEND(Q,M) TAILQ_INSERT_TAIL(Q,M,link)
#define MSGQ_PEEK(Q) (TAILQ_EMPTY((Q)) ? NULL : TAILQ_FIRST((Q)))
#define MSGQ_GET(Q) \
({ \
struct sscop_msg *_m = NULL; \
\
if(!TAILQ_EMPTY(Q)) { \
_m = TAILQ_FIRST(Q); \
TAILQ_REMOVE(Q, _m, link); \
} \
_m; \
})
#define MSGQ_CLEAR(Q) \
do { \
struct sscop_msg *_m1, *_m2; \
\
_m1 = TAILQ_FIRST(Q); \
while(_m1 != NULL) { \
_m2 = TAILQ_NEXT(_m1, link); \
SSCOP_MSG_FREE(_m1); \
_m1 = _m2; \
} \
TAILQ_INIT((Q)); \
} while(0)
/*
* Signal queues
*/
typedef TAILQ_ENTRY(sscop_sig) sscop_sigq_link_t;
typedef TAILQ_HEAD(sscop_sigq, sscop_sig) sscop_sigq_head_t;
#define SIGQ_INIT(Q) TAILQ_INIT(Q)
#define SIGQ_APPEND(Q,S) TAILQ_INSERT_TAIL(Q, S, link)
#define SIGQ_EMPTY(Q) TAILQ_EMPTY(Q)
#define SIGQ_GET(Q) \
({ \
struct sscop_sig *_s = NULL; \
\
if(!TAILQ_EMPTY(Q)) { \
_s = TAILQ_FIRST(Q); \
TAILQ_REMOVE(Q, _s, link); \
} \
_s; \
})
#define SIGQ_MOVE(F,T) \
do { \
struct sscop_sig *_s; \
\
while(!TAILQ_EMPTY(F)) { \
_s = TAILQ_FIRST(F); \
TAILQ_REMOVE(F, _s, link); \
TAILQ_INSERT_TAIL(T, _s, link); \
} \
} while(0)
#define SIGQ_PREPEND(F,T) \
do { \
struct sscop_sig *_s; \
\
while(!TAILQ_EMPTY(F)) { \
_s = TAILQ_LAST(F, sscop_sigq); \
TAILQ_REMOVE(F, _s, link); \
TAILQ_INSERT_HEAD(T, _s, link); \
} \
} while(0)
#define SIGQ_CLEAR(Q) \
do { \
struct sscop_sig *_s1, *_s2; \
\
_s1 = TAILQ_FIRST(Q); \
while(_s1 != NULL) { \
_s2 = TAILQ_NEXT(_s1, link); \
SSCOP_MSG_FREE(_s1->msg); \
SIG_FREE(_s1); \
_s1 = _s2; \
} \
TAILQ_INIT(Q); \
} while(0)
/*
* Message buffers
*/
/* Free a buffer (if there is one) */
#define MBUF_FREE(M) do { if(M) uni_msg_destroy(M); } while(0)
/* duplicate a buffer */
#define MBUF_DUP(M) uni_msg_dup(M)
/* compute current length */
#define MBUF_LEN(M) uni_msg_len((M))
/*
* Return the i-th word counted from the end of the buffer.
* i=-1 will return the last 32bit word, i=-2 the 2nd last.
* Assumes that there is enough space.
*/
#define MBUF_TRAIL32(M,I) uni_msg_trail32((M), (I))
/*
* Strip 32bit value from the end
*/
#define MBUF_STRIP32(M) uni_msg_strip32((M))
/*
* Strip 32bit value from head
*/
#define MBUF_GET32(M) uni_msg_get32((M))
/*
* Append a 32bit value to an mbuf. Failures are ignored.
*/
#define MBUF_APPEND32(M,W) uni_msg_append32((M), (W))
/*
* Pad a message to a multiple of four byte and return the amount of padding
* Failures are ignored.
*/
#define MBUF_PAD4(M) \
({ \
int _npad = 0; \
while (uni_msg_len(M) % 4 != 0) { \
uni_msg_append8((M), 0); \
_npad++; \
} \
_npad; \
})
#define MBUF_UNPAD(M,P) do { (M)->b_wptr -= (P); } while(0)
/*
* Allocate a message that will probably hold N bytes.
*/
#define MBUF_ALLOC(N) uni_msg_alloc(N)
#ifdef SSCOP_DEBUG
#define ASSERT(X) assert(X)
#else
#define ASSERT(X)
#endif