X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=platform%2Fexample_cygwin%2Ffunctions%2F_PDCLIB%2Fallocpages.c;fp=platform%2Fexample_cygwin%2Ffunctions%2F_PDCLIB%2Fallocpages.c;h=0000000000000000000000000000000000000000;hb=0cd903b82201176f3148f6d18d68fd30b82746d5;hp=cf939712799f11f928759b67b5438e5fae03d9b8;hpb=56bacb39160e13397fde32a36329461f3ae56ec1;p=pdclib

diff --git a/platform/example_cygwin/functions/_PDCLIB/allocpages.c b/platform/example_cygwin/functions/_PDCLIB/allocpages.c
deleted file mode 100644
index cf93971..0000000
--- a/platform/example_cygwin/functions/_PDCLIB/allocpages.c
+++ /dev/null
@@ -1,72 +0,0 @@
-/* _PDCLIB_allocpages( int const )
-
-   This file is part of the Public Domain C Library (PDCLib).
-   Permission is granted to use, modify, and / or redistribute at will.
-*/
-
-/* This is an example implementation of _PDCLIB_allocpages() (declared in
-   _PDCLIB_config.h), fit for use with POSIX kernels.
-*/
-
-#include <stdint.h>
-#include <stddef.h>
-
-void * sbrk( intptr_t );
-
-#include <_PDCLIB_glue.h>
-
-static void * membreak = NULL;
-
-void * _PDCLIB_allocpages( int const n )
-{
-    if ( membreak == NULL )
-    {
-        /* first call, make sure end-of-heap is page-aligned */
-        intptr_t unaligned = 0;
-        membreak = sbrk( 0 );
-        unaligned = _PDCLIB_PAGESIZE - (intptr_t)membreak % _PDCLIB_PAGESIZE;
-        if ( unaligned < _PDCLIB_PAGESIZE )
-        {
-            /* end-of-heap not page-aligned - adjust */
-            if ( sbrk( unaligned ) != membreak )
-            {
-                /* error */
-                return NULL;
-            }
-            membreak = (char *)membreak + unaligned;
-        }
-    }
-    /* increasing or decreasing heap - standard operation */
-    void * oldbreak = membreak;
-    membreak = (void *)( (char *)membreak + ( n * _PDCLIB_PAGESIZE ) );
-    if ( sbrk( (char*)membreak - (char*)oldbreak ) == membreak )
-    {
-        /* successful */
-        return oldbreak;
-    }
-    else
-    {
-        /* out of memory */
-        membreak = oldbreak;
-        return NULL;
-    }
-}
-
-#ifdef TEST
-#include <_PDCLIB_test.h>
-
-int main( void )
-{
-    char * startbreak = sbrk( 0 );
-    TESTCASE( _PDCLIB_allocpages( 0 ) );
-    TESTCASE( ( (char *)sbrk( 0 ) - startbreak ) <= _PDCLIB_PAGESIZE );
-    startbreak = sbrk( 0 );
-    TESTCASE( _PDCLIB_allocpages( 1 ) );
-    TESTCASE( sbrk( 0 ) == startbreak + ( 1 * _PDCLIB_PAGESIZE ) );
-    TESTCASE( _PDCLIB_allocpages( 5 ) );
-    TESTCASE( sbrk( 0 ) == startbreak + ( 6 * _PDCLIB_PAGESIZE ) );
-    TESTCASE( _PDCLIB_allocpages( -3 ) );
-    TESTCASE( sbrk( 0 ) == startbreak + ( 3 * _PDCLIB_PAGESIZE ) );
-}
-
-#endif