zanmato1984 commented on code in PR #48108:
URL: https://github.com/apache/arrow/pull/48108#discussion_r2522582980
##########
cpp/src/arrow/memory_pool.h:
##########
@@ -245,6 +246,64 @@ class ARROW_EXPORT ProxyMemoryPool : public MemoryPool {
std::unique_ptr<ProxyMemoryPoolImpl> impl_;
};
+/// EXPERIMENTAL MemoryPool wrapper with an upper limit
+class ARROW_EXPORT CappedMemoryPool : public MemoryPool {
+ public:
+ CappedMemoryPool(MemoryPool* wrapped_pool, int64_t bytes_allocated_limit)
+ : wrapped_(wrapped_pool), bytes_allocated_limit_(bytes_allocated_limit)
{}
+
+ using MemoryPool::Allocate;
+ using MemoryPool::Reallocate;
+
+ Status Allocate(int64_t size, int64_t alignment, uint8_t** out) override {
+ const auto attempted = size + wrapped_->bytes_allocated();
+ if (ARROW_PREDICT_FALSE(attempted > bytes_allocated_limit_)) {
+ return OutOfMemory(attempted);
+ }
Review Comment:
Thanks for the information. Then I think this attempt is well justified even
if it's still racy. I will later review the rest of the pr.
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
