本文整理汇总了C++中MemoryContext::resetToSavepoint方法的典型用法代码示例。如果您正苦于以下问题：C++ MemoryContext::resetToSavepoint方法的具体用法？C++ MemoryContext::resetToSavepoint怎么用？C++ MemoryContext::resetToSavepoint使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类MemoryContext的用法示例。
在下文中一共展示了MemoryContext::resetToSavepoint方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: testMemoryContext
void MemoryContextTestCase::testMemoryContext() {
MemoryContext *mc = new MemoryContext(4096, 1);
u64 firstSavepoint = mc->setSavepoint();
int chunkSize = 700;
void *first = mc->alloc(chunkSize);
memset(first, 0, chunkSize); // 便于valgrind检测有无越界写问题
for (int i = 0; i < 12; i++) {
void *chunk = mc->alloc(chunkSize);
memset(chunk, 0, chunkSize);
}
u64 savepoint = mc->setSavepoint();
void *firstAfterSavepoint = mc->alloc(chunkSize);
for (int i = 0; i < 12; i++) {
void *chunk = mc->alloc(chunkSize);
memset(chunk, 0, chunkSize);
}
// 分配超出页面大小的块
for (int i = 0; i < 3; i++)
mc->alloc(8000);
mc->resetToSavepoint(savepoint);
CPPUNIT_ASSERT(mc->setSavepoint() == savepoint);
CPPUNIT_ASSERT(mc->alloc(chunkSize) == firstAfterSavepoint);
mc->reset();
CPPUNIT_ASSERT(mc->setSavepoint() == firstSavepoint);
CPPUNIT_ASSERT(mc->alloc(chunkSize) == first); // 第一页始终保持因此地址不变
mc->resetToSavepoint(0);
CPPUNIT_ASSERT(mc->setSavepoint() == firstSavepoint);
CPPUNIT_ASSERT(mc->alloc(chunkSize) == first);
// 测试getMemUsage
{
mc->reset();
for (int i = 0; i < 12; i++)
mc->alloc(chunkSize);
CPPUNIT_ASSERT(mc->getMemUsage() > chunkSize * 12);
u64 muBak = mc->getMemUsage();
u64 savepoint = mc->setSavepoint();
for (int i = 0; i < 12; i++)
mc->alloc(chunkSize);
CPPUNIT_ASSERT(mc->getMemUsage() > chunkSize * 24);
mc->resetToSavepoint(savepoint);
CPPUNIT_ASSERT(mc->getMemUsage() == muBak);
mc->reset();
CPPUNIT_ASSERT(mc->getMemUsage() < muBak);
}
delete mc;
}示例2: testMemoryContextUsePool
void MemoryContextTestCase::testMemoryContextUsePool() {
uint poolSize = 4096;
uint reservedPages = 1;
PagePool pool(1, NTSE_PAGE_SIZE);
CommonMemPool commonMemPool(poolSize, &pool);
pool.registerUser(&commonMemPool);
pool.init();
MemoryContext *mc = new MemoryContext(&commonMemPool, reservedPages);
u64 firstSavepoint = mc->setSavepoint();
int chunkSize = 700;
void *first = mc->alloc(chunkSize);
memset(first, 0, chunkSize); // 便于valgrind检测有无越界写问题
for (int i = 0; i < 12; i++) {
void *chunk = mc->alloc(chunkSize);
memset(chunk, 0, chunkSize);
}
u64 savepoint = mc->setSavepoint();
void *firstAfterSavepoint = mc->alloc(chunkSize);
for (int i = 0; i < 12; i++) {
void *chunk = mc->alloc(chunkSize);
memset(chunk, 0, chunkSize);
}
// 分配超出页面大小的块
for (int i = 0; i < 3; i++)
NTSE_ASSERT(NULL == mc->alloc(NTSE_PAGE_SIZE + 1));
mc->resetToSavepoint(savepoint);
CPPUNIT_ASSERT(mc->setSavepoint() == savepoint);
CPPUNIT_ASSERT(mc->alloc(chunkSize) == firstAfterSavepoint);
// 测试内存池内存不足
mc->reset();
for (int i = 0; i < poolSize; i++) {
int cs = NTSE_PAGE_SIZE / 2 + 100;
void *data = mc->alloc(cs);
NTSE_ASSERT(NULL != data);
memset(data, 0, cs);
}
NTSE_ASSERT(poolSize == commonMemPool.getCurrentSize());
for (int i = 0; i < 10; i++) {
int cs = NTSE_PAGE_SIZE / 2 + 100;
void *data = mc->alloc(cs);
NTSE_ASSERT(NULL == data);
NTSE_ASSERT(poolSize == commonMemPool.getCurrentSize());
}
mc->reset();
CPPUNIT_ASSERT(mc->setSavepoint() == firstSavepoint);
CPPUNIT_ASSERT(mc->alloc(chunkSize) == first); // 第一页始终保持因此地址不变
mc->resetToSavepoint(0);
CPPUNIT_ASSERT(mc->setSavepoint() == firstSavepoint);
CPPUNIT_ASSERT(mc->alloc(chunkSize) == first);
// 测试getMemUsage
{
mc->reset();
for (int i = 0; i < 12; i++)
mc->alloc(chunkSize);
CPPUNIT_ASSERT(mc->getMemUsage() > chunkSize * 12);
u64 muBak = mc->getMemUsage();
u64 savepoint = mc->setSavepoint();
for (int i = 0; i < 12; i++)
mc->alloc(chunkSize);
CPPUNIT_ASSERT(mc->getMemUsage() > chunkSize * 24);
mc->resetToSavepoint(savepoint);
CPPUNIT_ASSERT(mc->getMemUsage() == muBak);
mc->reset();
CPPUNIT_ASSERT(mc->getMemUsage() < muBak);
}
delete mc;
mc = NULL;
// 测试预留页面数
for (uint i = 1; i <= 10; i++) {
mc = new MemoryContext(&commonMemPool, i);
uint lastUsedPages = commonMemPool.getCurrentSize();
for (uint j = 0; j < i; j++) {
int cs = NTSE_PAGE_SIZE / 2 + 100;
void *data = mc->alloc(cs);
memset(data, 0, cs);
}
NTSE_ASSERT(lastUsedPages == commonMemPool.getCurrentSize());
mc->reset();
delete mc;
mc = NULL;
}
}