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Really free stack after last BearSSL obj destroyed (#5185)

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The BearSSL second stack, once allocated, was never deallocated.  The
reference count of the stack pointer never hit 0 due to the initial
creation counting as one.  Now, check to see if there is only one use_count
and if so then delete the stack.
This commit is contained in:
Earle F. Philhower, III
2018-09-29 18:12:03 -07:00
committed by GitHub
parent 4e3af9795b
commit 270788bedb
2 changed files with 15 additions and 2 deletions
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libraries/ESP8266WiFi/src/WiFiClientSecureBearSSL.h
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@ -229,6 +229,7 @@ class WiFiClientSecure : public WiFiClient {
private:
// Single memory buffer used for BearSSL auxilliary stack, insead of growing main Arduino stack for all apps
static std::shared_ptr<uint8_t> _bearssl_stack;
void _ensureStackAvailable(); // Allocate the stack if necessary
// The local copy, only used to enable a reference count
std::shared_ptr<uint8_t> _local_bearssl_stack;
};