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py: Change config default so m_malloc0 uses memset if GC not enabled.

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With MICROPY_ENABLE_GC set to false the alternate memory manager may not
clear all memory that is allocated, so it must be cleared in m_malloc0.
This commit is contained in:
Colin Hogben 2016-10-31 14:52:11 +00:00 committed by Damien George
parent 94aeba0427
commit 828df54bfe
1 changed files with 2 additions and 1 deletions

3
py/mpconfig.h

@ -110,10 +110,11 @@
// Be conservative and always clear to zero newly (re)allocated memory in the GC. // Be conservative and always clear to zero newly (re)allocated memory in the GC.
// This helps eliminate stray pointers that hold on to memory that's no longer // This helps eliminate stray pointers that hold on to memory that's no longer
// used. It decreases performance due to unnecessary memory clearing. // used. It decreases performance due to unnecessary memory clearing.
// A memory manager which always clears memory can set this to 0.
// TODO Do analysis to understand why some memory is not properly cleared and // TODO Do analysis to understand why some memory is not properly cleared and
// find a more efficient way to clear it. // find a more efficient way to clear it.
#ifndef MICROPY_GC_CONSERVATIVE_CLEAR #ifndef MICROPY_GC_CONSERVATIVE_CLEAR
#define MICROPY_GC_CONSERVATIVE_CLEAR (1) #define MICROPY_GC_CONSERVATIVE_CLEAR (MICROPY_ENABLE_GC)
#endif #endif
// Support automatic GC when reaching allocation threshold, // Support automatic GC when reaching allocation threshold,