new-operator

问题 Properly linked DLLs and EXEs are supposed to have one freestore from which they all can allocate heap-based objects. Here is Chis Becke’s Answer in Who allocates heap to a DLL?: … it is the C++ runtime that is responsible for creating its freestore and deciding how to allocate it. Specifically, if you use the Dll runtime option, then a single dll - msvcrtxx.dll - manages a single freestore that is shared between all dll's, and the exe, that are linked against that dll Since this is true,

问题 I am trying to visualize normals that are contained in a pcl::PointNormal point cloud. I try to do this with following code: std::shared_ptr<pcl::visualization::PCLVisualizer> viewer; std::mutex viewerMutex; void viewerThreadFunction() { while(true) { if(viewer->wasStopped()) break; viewerMutex.lock(); viewer->spinOnce(); viewerMutex.unlock(); } } int main() { viewer = std::shared_ptr<pcl::visualization::PCLVisualizer>( new pcl::visualization::PCLVisualizer("Viewer")); viewer-

问题 This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. Closed 7 years ago . This is my assignment question Create a class with its own operator new. This operator should allocate 5 objects, and on 5th 'run out of memory' and

问题 Hi this is a little complicated so please let me know if any of this does not make sense, our team is writing a C++ application and we have previously had operator new overloaded. Recently I ran into this article: http://www.flipcode.com/archives/How_To_Find_Memory_Leaks.shtml about how to get debug information with our memory allocations. All the files within the application #include one file where we have compile-time platform configurations, and within that file I added the following:

问题 I want to know whether I can use the OLD and NEW objects for dynamic operations inside trigger. What I am looking for is something like this :- ABC is a table for which I need to write Trigger. TracK_Table maintains list of columns for table which need to be tracked (logged). f_log is a function that inserts changes in data into a tracking(log) table. CREATE OR REPLACE TRIGGER trg_TRACK AFTER INSERT OR UPDATE OR DELETE ON ABC FOR EACH ROW declare v_old_val varchar2(1000); v_new_val varchar2

问题 I have device variable and in this variable, I allocate and fill an array in the device, but I have a problem to get data to host. cudaMemcpy() return cudaErrorInvalidValue error. how can I do it? PS: The Code is just example, I know, that In this particular case I can use cudaMalloc because I know the size of the array, but In my REAL code, It computes the size of the array in the device and it needs immediately allocate memory. PS2: I found a similar problem, but I still don't know, how can

问题 I've been using pointer = new type[size] for a while now and just recently discovered malloc . Is there a technical difference between malloc and new ? If so, what are the advantages to using one over the other? 回答1: malloc is a function call, new in this case an expression. The difference is; new will allocate memory and construct all the elements of that array with the default constructor. malloc just gives back a chunk of uninitialized memory. Further still, ::operator new will throw std:

问题 I need singleton with a application lifetime, guaranteed creation/destruction and static access to it. #include <iostream> #include <cstdlib> #define DISALLOW_COPY_AND_ASSIGN(TypeName) \ TypeName(const TypeName&); \ void operator=(const TypeName&) #define M() C::sM() #define M2() C::sM2() using namespace std; class C { private: static C* s; ~C() { cout << "~C()" << endl; } static C* instance() { if (s==NULL) { s=new C(); } cout << "instance()=" << s << endl; return s; } static void cleanUp()

问题 i am having problems with retrieving my products, in 1.3 it worked and i just added some products on 1.4 but there is a new function in the capalogProductInfo called the product identifier, i don't know what to put in there, i tried passing down product type form list but i keep getting a error that says that the product does not exit. can anyone help? catalogProductInfo(sessionId, Product_id, CurrentStore, attributes, productIdentifierType) 回答1: Before I defined the attributes I wanted back,

问题 I'm writing on c++ in VS2010 Windows 7. I try to read file of size 64 bytes. Here's the code: BYTE* MyReadFile(FILE *f) { size_t result; BYTE *buffer; long lSize; if (f == NULL) { fputs ("File error", stderr); exit (1); } fseek (f, 0, SEEK_END); lSize = ftell (f); rewind (f); //buffer = (BYTE*) malloc (sizeof(char)*lSize); buffer = new BYTE[lSize]; if (buffer == NULL) { fputs ("Memory error", stderr); exit (2); } result = fread (buffer, 1, lSize, f); if (result != lSize) { fputs ("Reading