kern_kmsg.h

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    1 /* 
    2  * Mach Operating System
    3  * Copyright (c) 1993 Carnegie Mellon University
    4  * All Rights Reserved.
    5  * 
    6  * Permission to use, copy, modify and distribute this software and its
    7  * documentation is hereby granted, provided that both the copyright
    8  * notice and this permission notice appear in all copies of the
    9  * software, derivative works or modified versions, and any portions
   10  * thereof, and that both notices appear in supporting documentation.
   11  * 
   12  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
   13  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
   14  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   15  * 
   16  * Carnegie Mellon requests users of this software to return to
   17  * 
   18  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   19  *  School of Computer Science
   20  *  Carnegie Mellon University
   21  *  Pittsburgh PA 15213-3890
   22  * 
   23  * any improvements or extensions that they make and grant Carnegie Mellon 
   24  * the rights to redistribute these changes.
   25  */
   26 /*
   27  * HISTORY
   28  * $Log:        kern_kmsg.h,v $
   29  * Revision 2.2  93/11/17  17:13:18  dbg
   30  *      Created.
   31  *      [93/03/29            dbg]
   32  * 
   33  */
   34 
   35 /*
   36  *      File:   kern/kern_kmsg.h
   37  *      Author: David Golub, 1993
   38  *
   39  *      Routines for allocating and freeing reply messages from
   40  *      the kernel IPC interface.
   41  */
   42 
   43 #ifndef _KERN_KERN_KMSG_H_
   44 #define _KERN_KERN_KMSG_H_
   45 
   46 #include <ipc/ipc_kmsg.h>
   47 #include <kern/macro_help.h>
   48 #include <kern/zalloc.h>
   49 
   50 /*
   51  *      Kernel reply kmsg allocation.
   52  */
   53 
   54 extern zone_t   kernel_reply_kmsg_zone;
   55 
   56 extern void     kernel_reply_kmsg_init(void);
   57 
   58 #define kernel_reply_kmsg_get(kmsg) \
   59 MACRO_BEGIN \
   60         (kmsg) = ((ipc_kmsg_t) zalloc(kernel_reply_kmsg_zone)); \
   61         if ((kmsg) != IKM_NULL) \
   62             ikm_init_special((kmsg), IKM_SIZE_KERN_REPLY); \
   63 MACRO_END
   64 
   65 #define kernel_reply_kmsg_put(kmsg) \
   66 MACRO_BEGIN \
   67         ikm_check_initialized((kmsg), IKM_SIZE_KERN_REPLY); \
   68         zfree(kernel_reply_kmsg_zone, (vm_offset_t)(kmsg)); \
   69 MACRO_END
   70 
   71 #endif  /* _KERN_KERN_KMSG_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/kern/kern_kmsg.h

FreeBSD/Linux Kernel Cross Reference
sys/kern/kern_kmsg.h