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Traditional lock-based thread safety for HeapBasedPoolAllocator

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This commit is contained in:
Pavel Kirienko
2015-10-15 16:49:03 +03:00
parent ef93f1b1e8
commit 913f6ea034
2 changed files with 27 additions and 56 deletions
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libuavcan/test/helpers/heap_based_pool_allocator.cpp
+9 -16
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@@ -6,17 +6,13 @@
#include <uavcan/helpers/heap_based_pool_allocator.hpp>
#include <malloc.h>
inline bool atomicCompareAndSwap(void** address, void* expected, void* replacement)
{
return __sync_bool_compare_and_swap(address, expected, replacement);
}
TEST(HeapBasedPoolAllocator, Basic)
{
std::cout << ">>> HEAP BEFORE:" << std::endl;
malloc_stats();
uavcan::HeapBasedPoolAllocator<uavcan::MemPoolBlockSize, atomicCompareAndSwap> al(64);
uavcan::HeapBasedPoolAllocator<uavcan::MemPoolBlockSize> al(64);
ASSERT_EQ(0, al.getNumCachedBlocks());
@@ -63,25 +59,22 @@ TEST(HeapBasedPoolAllocator, Basic)
#if UAVCAN_CPP_VERSION >= UAVCAN_CPP11
#include <thread>
#include <mutex>
inline bool atomicCompareAndSwapWithRescheduling(void** address, void* expected, void* replacement)
struct RaiiSynchronizer
{
/*
* Yield is added for testing reasons, making CAS failure more likely
*/
if ((float(std::rand()) / float(RAND_MAX)) < 0.05)
{
std::this_thread::yield();
}
return __sync_bool_compare_and_swap(address, expected, replacement);
}
static std::mutex mutex;
std::lock_guard<std::mutex> guard{mutex};
};
std::mutex RaiiSynchronizer::mutex;
TEST(HeapBasedPoolAllocator, Concurrency)
{
std::cout << ">>> HEAP BEFORE:" << std::endl;
malloc_stats();
uavcan::HeapBasedPoolAllocator<uavcan::MemPoolBlockSize, atomicCompareAndSwapWithRescheduling> al(1);
uavcan::HeapBasedPoolAllocator<uavcan::MemPoolBlockSize, RaiiSynchronizer> al(1);
volatile bool terminate = false;