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Allocate_Misc.c
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C/C++ Source or Header
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1992-09-03
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3KB
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97 lines
/*
* Copyright (c) 1992 Commodore-Amiga, Inc.
*
* This example is provided in electronic form by Commodore-Amiga, Inc. for
* use with the "Amiga ROM Kernel Reference Manual: Devices", 3rd Edition,
* published by Addison-Wesley (ISBN 0-201-56775-X).
*
* The "Amiga ROM Kernel Reference Manual: Devices" contains additional
* information on the correct usage of the techniques and operating system
* functions presented in these examples. The source and executable code
* of these examples may only be distributed in free electronic form, via
* bulletin board or as part of a fully non-commercial and freely
* redistributable diskette. Both the source and executable code (including
* comments) must be included, without modification, in any copy. This
* example may not be published in printed form or distributed with any
* commercial product. However, the programming techniques and support
* routines set forth in these examples may be used in the development
* of original executable software products for Commodore Amiga computers.
*
* All other rights reserved.
*
* This example is provided "as-is" and is subject to change; no
* warranties are made. All use is at your own risk. No liability or
* responsibility is assumed.
*
*****************************************************************************
*
*
* Allocate_Misc.c
*
* Example of allocating a miscellaneous resource
* We will allocate the serial resource and wait till
* CTRL-C is pressed. While we are waiting, the
* query_serial program should be run. It will try
* to open the serial device and if unsuccessful, will
* return the name of the owner. It will be us!
*
* Compile with SAS 5.10 lc -b1 -cfistq -v -y -L
*
* Run from CLI only
*/
#include <exec/types.h>
#include <exec/memory.h>
#include <dos/dos.h>
#include <resources/misc.h>
#include <clib/exec_protos.h>
#include <clib/misc_protos.h>
#include <stdio.h>
#ifdef LATTICE
int CXBRK(void) { return(0); } /* Disable SAS CTRL/C handling */
int chkabort(void) { return(0); } /* really */
#endif
struct Library *MiscBase = NULL;
void main(int argc, char **argv)
{
UBYTE *owner = NULL; /* owner of misc resource */
if (!(MiscBase= (struct Library *)OpenResource(MISCNAME)))
printf("Cannot open %s\n",MISCNAME);
else
{
/* Allocate both pieces of the serial hardware */
if ((owner = AllocMiscResource(MR_SERIALPORT,"Serial Port Hog")) == NULL)
{
if ((owner = AllocMiscResource(MR_SERIALBITS,"Serial Port Hog")) == NULL)
{
/* Wait for CTRL-C to be pressed */
printf("\nWaiting for CTRL-C...\n");
Wait(SIGBREAKF_CTRL_C);
/* We're back */
/* Deallocate the serial port register */
FreeMiscResource(MR_SERIALBITS);
}
else
printf("\nUnable to allocate MR_SERIALBITS because %s owns it\n",owner);
/* Deallocate the serial port */
FreeMiscResource(MR_SERIALPORT);
}
else
printf("\nUnable to allocate MR_SERIALPORT because %s owns it\n",owner);
}
}