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ICU-6645 Add comment explaining USTRING_ALLOC_START

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X-SVN-Rev: 25545
This commit is contained in:
Peter Edberg 2009-03-11 04:21:22 +00:00
parent 93e35cf3db
commit dfd1678de7
1 changed files with 6 additions and 0 deletions
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6
icu4c/source/i18n/zonemeta.cpp
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@ -34,6 +34,12 @@ static UChar **gUStringTable = NULL;
static int32_t gUStringCount = 0;
static int32_t gUStringAlloc = 0;
// Currently (ICU 4.1.3+), gUStringTable only contains strings allocated in the section of
// createCanonicalMap that iterates over the enumerator created with TimeZone::createEnumeration.
// And currently, that allocates a total of 22 strings. So USTRING_ALLOC_START is defined to
// be adequate for that set, and USTRING_ALLOC_INCR is a reasonable expansion increment. In
// future versions of ICU, these numbers may need adjusting to avoid excessive reallocs, or to
// avoid allocating unused memory (but in any case the effects are small).
#define USTRING_ALLOC_START 24
#define USTRING_ALLOC_INCR 12