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Annotation of qemu/roms/SLOF/clients/net-snk/libc/sbrk.c, revision 1.1

1.1     ! root        1: /******************************************************************************
        !             2:  * Copyright (c) 2004, 2008 IBM Corporation
        !             3:  * All rights reserved.
        !             4:  * This program and the accompanying materials
        !             5:  * are made available under the terms of the BSD License
        !             6:  * which accompanies this distribution, and is available at
        !             7:  * http://www.opensource.org/licenses/bsd-license.php
        !             8:  *
        !             9:  * Contributors:
        !            10:  *     IBM Corporation - initial implementation
        !            11:  *****************************************************************************/
        !            12: 
        !            13: #define HEAP_SIZE 0x200000
        !            14: 
        !            15: 
        !            16: static char heap[HEAP_SIZE];
        !            17: static char *actptr;
        !            18: 
        !            19: void *sbrk(int increment)
        !            20: {
        !            21:        char *oldptr;
        !            22: 
        !            23:        /* Called for the first time? Then init the actual pointer */
        !            24:        if (!actptr) {
        !            25:                actptr = heap;
        !            26:        }
        !            27: 
        !            28:        if (actptr + increment > heap + HEAP_SIZE) {
        !            29:                /* Out of memory */
        !            30:                return (void *)-1;
        !            31:        }
        !            32: 
        !            33:        oldptr = actptr;
        !            34:        actptr += increment;
        !            35: 
        !            36:        return oldptr;
        !            37: }

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