Category : C Source Code
Archive   : MCOMM600.ZIP
Filename : ALLOCRB.C

 
Output of file : ALLOCRB.C contained in archive : MCOMM600.ZIP

/*
ALLOCRB.C -- source file of code to allocate ring buffers and initialize
the required port structure members for MCOMM5 async routines.

Mike Dumdei, 6 Holly Lane, Texarkana TX 75503 (c) 1989
*/

#if defined(__TURBOC__)
#include
#define _fmalloc farmalloc
#elif defined(__ZTC__)
#include
#include
#define _fmalloc farmalloc
#else
#include
#endif
#include

int AllocRingBuffer(
ASYNC *port, /* pointer to port structure */
int rxsize, /* number bytes to use for receive buffer */
int txsize, /* number bytes to use for transmit buffer */
int useFARmem) /* flag set if using FAR mem for buffers */
{
unsigned long memptr;
int memsize;

memsize = rxsize + txsize;

if (useFARmem || sizeof(char *) == 4) /* if FAR Ring bufs */
memptr = (unsigned long)_fmalloc(memsize);
else /* if Ring buffers use NEAR memory */
memptr = (unsigned long)(unsigned int)malloc(memsize);

/* pre-initialize 4 required structure members */
port->RxSize = rxsize; /* receive buffer size */
port->TxSize = txsize; /* transmit buffer size */
port->RingSeg = (int)(memptr >> 16); /* SEG adr */
port->RingOfst = (int)memptr; /* OFST address */
if (memptr == 0L)
return 0; /* return 0 if no memory available */
return 1; /* return 1, had some memory */
}



  3 Responses to “Category : C Source Code
Archive   : MCOMM600.ZIP
Filename : ALLOCRB.C
”

  1. Daniel says:
    January 27, 2013 at 3:59 pm

    Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. Joshie says:
    March 18, 2014 at 4:57 pm

    This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

  3. DiskingRound says:
    January 14, 2015 at 10:57 pm

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