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FlattenableUtils::align memsets

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am: e62a9d7669

Change-Id: I51a5528d8544f374ff3ceb632e75a1d3ae97d963
This commit is contained in:
Steven Moreland 2019-11-06 15:55:08 -08:00 • committed by android-build-merger
commit 59e7d4e8ea
1 changed files with 6 additions and 1 deletions
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7
libutils/include/utils/Flattenable.h
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@ -47,7 +47,12 @@ public:
template<size_t N> template<size_t N>
static size_t align(void*& buffer) { static size_t align(void*& buffer) {
return align<N>( const_cast<void const*&>(buffer) ); static_assert(!(N & (N - 1)), "Can only align to a power of 2.");
void* b = buffer;
buffer = reinterpret_cast<void*>((uintptr_t(buffer) + (N-1)) & ~(N-1));
size_t delta = size_t(uintptr_t(buffer) - uintptr_t(b));
memset(b, 0, delta);
return delta;
} }
static void advance(void*& buffer, size_t& size, size_t offset) { static void advance(void*& buffer, size_t& size, size_t offset) {