mirror of https://github.com/ArduPilot/ardupilot
fixed spelling
git-svn-id: https://arducopter.googlecode.com/svn/trunk@3244 f9c3cf11-9bcb-44bc-f272-b75c42450872
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@ -1,7 +1,7 @@
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/// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
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/*
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note that we use a 32 bit sentinal to reduce the chance
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note that we use a 32 bit sentinel to reduce the chance
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of false positives with uninitialised stack variables
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*/
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@ -11,7 +11,7 @@ static const uint32_t *stack_low;
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extern unsigned __brkval;
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#define STACK_OFFSET 2
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#define SENTINAL 0x28021967
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#define SENTINEL 0x28021967
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/*
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return the current stack pointer
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@ -23,7 +23,7 @@ static __attribute__((noinline)) const uint32_t *current_stackptr(void)
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/*
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this can be added in deeply nested code to ensure we catch
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deep stack usage. It should be caught by the sentinal, but this
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deep stack usage. It should be caught by the sentinel, but this
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is an added protection
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*/
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void memcheck_update_stackptr(void)
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@ -35,7 +35,7 @@ void memcheck_update_stackptr(void)
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}
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/*
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initialise memcheck, setting up the sentinals
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initialise memcheck, setting up the sentinels
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*/
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void memcheck_init(void)
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{
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@ -44,18 +44,18 @@ void memcheck_init(void)
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stack_low = current_stackptr();
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memcheck_update_stackptr();
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for (p=(uint32_t *)(stack_low-1); p>(uint32_t *)__brkval; p--) {
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*p = SENTINAL;
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*p = SENTINEL;
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}
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}
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/*
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this returns the real amount of free memory by looking for
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overwrites of the stack sentinal values
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overwrites of the stack sentinel values
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*/
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unsigned memcheck_available_memory(void)
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{
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memcheck_update_stackptr();
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while (*stack_low != SENTINAL && stack_low > (const uint32_t *)__brkval) {
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while (*stack_low != SENTINEL && stack_low > (const uint32_t *)__brkval) {
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stack_low--;
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}
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return (unsigned)(stack_low) - __brkval;
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