workbench/network/stacks/AROSTCP/bsdsocket/sys/synch.h

   1 /*
   2  * Copyright (C) 1993 AmiTCP/IP Group, <amitcp-group@hut.fi>
   3  *                    Helsinki University of Technology, Finland.
   4  *                    All rights reserved.
   5  * Copyright (C) 2005 Neil Cafferkey
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  19  * MA 02111-1307, USA.
  20  *
  21  */
  22
  23 #ifndef SYS_SYNCH_H
  24 #define SYS_SYNCH_H
  25
  26 #ifndef SYS_TYPES_H
  27 #include <sys/types.h>
  28 #endif
  29
  30 #ifndef EXEC_TYPES_H
  31 #include <exec/types.h>
  32 #endif
  33
  34 #ifndef SYS_TIME_H
  35 #include <sys/time.h>
  36 #endif
  37
  38 #if !defined(AMIGA_INCLUDES_H) && defined(DEBUG)
  39 #include <kern/amiga_includes.h> /* for the inline spl_n() */
  40 #endif
  41
  42 #include <proto/exec.h>
  43
  44 extern BOOL sleep_init(void);
  45 extern void tsleep_send_timeout(struct SocketBase *, const struct timeval *);
  46 extern void tsleep_abort_timeout(struct SocketBase *, const struct timeval *);
  47 extern void tsleep_enter(struct SocketBase *, caddr_t, const char *);
  48 extern int  tsleep_main(struct SocketBase *, ULONG blockmask);
  49 extern int  tsleep(struct SocketBase *, caddr_t, const char *,const struct timeval *);
  50 extern void wakeup(caddr_t);
  51
  52 /*
  53  * Spl-levels used in this implementation
  54  */
  55 #define SPL0         0
  56 #define SPLSOFTCLOCK 1
  57 #define SPLNET       2
  58 #define SPLIMP       3
  59
  60 /*
  61  * Spl-function prototypes and definitions.
  62  *
  63  * spl_t is the return type of the spl_n(). It should be used when defining
  64  * storage to store the return value, using int may be little slower :-)
  65  */
  66
  67 extern BOOL spl_init(void);
  68
  69 /*#ifdef DEBUG*/ /* NC */
  70 #if 1
  71
  72 typedef int spl_t;
  73
  74 extern spl_t spl_n(spl_t newlevel);
  75
  76 #define spl0()          spl_n(SPL0)
  77 #define splsoftclock()  spl_n(SPLSOFTCLOCK)
  78 #define splnet()        spl_n(SPLNET)
  79 #define splimp()        spl_n(SPLIMP)
  80 #define splx(s)         spl_n(s)
  81
  82 #else
  83
  84 typedef BYTE spl_t;             /* the type of SysBase->TDNestCnt */
  85
  86 extern struct ExecBase * SysBase;
  87
  88 extern spl_t spl_level;
  89
  90 static inline spl_t
  91 splx(spl_t new_level)
  92 {
  93   spl_t old_level;
  94
  95   old_level = spl_level;
  96   if(spl_level == SPL0 && new_level > SPL0)
  97     Forbid();
  98   spl_level = new_level;
  99   if(old_level > SPL0 && new_level == SPL0)
 100     Permit();
 101
 102   return old_level;
 103 }
 104
 105 #define spl0()          splx(SPL0)
 106 #define splsoftclock()  splx(SPLSOFTCLOCK)
 107 #define splnet()        splx(SPLNET)
 108 #define splimp()        splx(SPLIMP)
 109
 110 #endif /* DEBUG */
 111
 112 #endif /* !SYS_SYNCH_H */