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reset wait_set type index in SET_RESIZE #207

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Jan 19, 2018
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reset wait_set type index in SET_RESIZE #207

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1 change: 1 addition & 0 deletions rcl/src/rcl/wait.c
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Original file line number Diff line number Diff line change
Expand Up @@ -296,6 +296,7 @@ rcl_wait_set_get_allocator(const rcl_wait_set_t * wait_set, rcl_allocator_t * al
} \
rcl_allocator_t allocator = wait_set->impl->allocator; \
wait_set->size_of_ ## Type ## s = 0; \
wait_set->impl->Type ## _index = 0; \
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Shouldn't this be set to the min() of the requested size and the wait_set->impl->Type ## _index? Otherwise this is also like a "clear" which is not the intention I think. If the size before was 4 and the index was 2, then the resize was to be 8, the index should still be 2 right?

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@jwang11 jwang11 Jan 11, 2018 •
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Look at the realloc code after that, it actually clear the new allocated memory. So, I think the old index is meaningless. If people want old index value, he should save it out before SET_RESIZE.

  memset((void *)wait_set->Type ## s, 0, sizeof(rcl_ ## Type ## _t *) * size); \
  wait_set->size_of_ ## Type ## s = size; \

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You're right, it does zero the memory. 👍

if (size == 0) { \
if (wait_set->Type ## s) { \
allocator.deallocate((void *)wait_set->Type ## s, allocator.state); \
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