1 /*---------------------------------------------------------------------------* 2 * PStackSize.c * 3 * * 4 * Copyright 2007, 2008 Nuance Communciations, Inc. * 5 * * 6 * Licensed under the Apache License, Version 2.0 (the 'License'); * 7 * you may not use this file except in compliance with the License. * 8 * * 9 * You may obtain a copy of the License at * 10 * http://www.apache.org/licenses/LICENSE-2.0 * 11 * * 12 * Unless required by applicable law or agreed to in writing, software * 13 * distributed under the License is distributed on an 'AS IS' BASIS, * 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * 15 * See the License for the specific language governing permissions and * 16 * limitations under the License. * 17 * * 18 *---------------------------------------------------------------------------*/ 19 20 #include "pstdio.h" 21 #include "PStackSize.h" 22 23 #ifdef _WIN32 24 25 static const char * PSTACK_BASE = NULL; 26 27 /** Initialize the stack base. This should be done in the main() function. 28 * Note that the local variables of main() are not taken into account in the 29 * stack size computation. To overcome this problem, rewrite main() as a 30 * simple function that first invokes PSTACK_SIZE_INIT and then invokes the 31 * original main(). 32 */ 33 void PSTACK_SIZE_INIT() 34 { 35 PSTACK_BASE = (const char *) _alloca(0); 36 } 37 38 /** 39 * Computes the current stack size. The returned value is the number of bytes 40 * in the stack. 41 **/ 42 size_t PSTACK_SIZE_GET() 43 { 44 return (PSTACK_BASE - ((const char *) _alloca(0))); 45 } 46 47 #else 48 49 /* Insert other platform implementations here... */ 50 /* 51 #error not supported at this time 52 */ 53 void PSTACK_SIZE_INIT() 54 {} 55 56 size_t PSTACK_SIZE_GET() 57 { 58 return 0; 59 } 60 61 #endif 62
