close(); return ret; } void makeMatrix(MKL_INT** rowIndex, MKL_INT** columns, double** values, int nnz, int colSize) { *rowIndex = new MKL_INT[nnz]; *columns = new MKL_INT[nnz]; *values = new double[nnz]; map<int, set<int>> indices; for(int k = 0; ...
内容读取异常:例如两个线程一个在读,一个在写,或者两个线程同时在写,都会导致单个数据内部出现不一致的情况。 vector扩容时,内存位置发生改变导致Segmentation fault错误。因为vector在扩容时会将内容全部拷贝到新的内存区域中,原有的内存区域被释放,此时如果有线程依然在向旧的内存区域读或写就会出问题。 举一个简...
这里实际上会输出Segmentation fault,原因是因为当从list中erase这个node,这个node的prev和next指针被清空,而++it是通过当前的node的next指针去找下一个node,解引用一个空指针,导致coredump。 erase函数返回下一个有效迭代器,所以可以把if(0 == *it % 2) li.erase(it)修改为if(0 == *it % 2) it = li....
classMyClass {private: std::map<std::string, std::string> map_;public: MyClass(constmap<string, string> default_map = mk_map()) : map_(default_map) { }staticmap<string, string> mk_map() { map<string, string> m; m.insert(pair<string, string>("",""));returnm; } }; ...
这段代码看__unguarded_insertion_sort还没有什么问题,但是__unguarded_linear_insert中的逻辑就比较迷幻了,只有当__comp(__val, __next)的值为false时才会停止。 其中__comp就是我们之前自定义的lambda表达式,我们当时写的是return v1 >= v2;,翻译过来也就是当!(val >= __next)时,即后一个元素小于前一...
std::map<FooKey , Foo>::iterator it(map.find(foo )); it->second.sort_cr iterion = 83; // container is now invalid return 0; } For now, I think I'm going to try something less complex. I'll use a seperate replace() function instead of trying to use an iterator to do this...
close(); return ret; } void makeMatrix(MKL_INT** rowIndex, MKL_INT** columns, double** values, int nnz, int colSize) { *rowIndex = new MKL_INT[nnz]; *columns = new MKL_INT[nnz]; *values = new double[nnz]; map<int, set<int>> indices; for(int k = 0; k...
close(); return ret; } void makeMatrix(MKL_INT** rowIndex, MKL_INT** columns, double** values, int nnz, int colSize) { *rowIndex = new MKL_INT[nnz]; *columns = new MKL_INT[nnz]; *values = new double[nnz]; map<int, set<int>> indices; for(int k = 0; k <...
close(); return ret; } void makeMatrix(MKL_INT** rowIndex, MKL_INT** columns, double** values, int nnz, int colSize) { *rowIndex = new MKL_INT[nnz]; *columns = new MKL_INT[nnz]; *values = new double[nnz]; map<int, set<int>> in...
close(); return ret; } void makeMatrix(MKL_INT** rowIndex, MKL_INT** columns, double** values, int nnz, int colSize) { *rowIndex = new MKL_INT[nnz]; *columns = new MKL_INT[nnz]; *values = new double[nnz]; map<int, set<int>> indices;...