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1. C + + template Template definition: template is a tool to realize the code reuse mechanism. It can realize type parameterization, that is, define types as parameters, so as to realize the real code reusability. Template classification: function template and class template. Function templates are for functions with different parameter t ...

1. Use out of source to build multiple directories and multiple files         The file storage method here is as follows:           Where build is the build directory, that is, the build results and intermediate products are in this directory Include is the include directory src is the directory of sub functions or dep ...

4 program flow structure C/C + + supports three basic program running structures: sequential structure, selection structure and loop structure Sequence structure: the program is executed in sequence without jumpSelect structure: perform corresponding functions selectively according to whether the conditions are metLoop structure: executes a p ...

Mutex locks ensure synchronization between threads, but they turn parallel operations into serial operations, which have a significant impact on performance, so we want to minimize the area of locks that we lock, that is, use fine-grained locks. This lock_guard is not good, not flexible enough, lock_guard can only guarantee unlocking at the ti ...

Note: the coding tool is CLion+Cygwin64 catalogue Smart pointer shared_ptr Reference counter Circular reference weak_ptr unique_ptr Copywriting smart pointer Type conversion const_cast static_cast dynamic_cast reinterpret_cast Smart pointer         Smart pointers can be used to automatically recycle object ...

brief introduction NE, the full name of Native Exception, in Android, mainly refers to exceptions in native programs or natvie libraries running in user space. NE problems usually lead to program collapse, resulting in unstable functional modules. Common types of NE problems The following describes several common Native Crash situations: ...

Experiment 4 memory allocation algorithm 1, Experimental purpose Write a program to simulate the allocation of memory;Through experiments, we can understand how to realize the allocation and recovery of main memory space under the dynamic partition management mode; 2, Background knowledge A good computer system should not only have a suffic ...

Arguments to constructor The constructor of std::thread class is implemented using a variable parameter template, that is, any parameter can be passed. The first parameter is the entry function of the thread, and the following parameters are the parameters of the function. The type of the first parameter is not the function pointer in c langu ...

Handwritten database connection pool The returned is a shared with connection_ PTR object Key technical points MySQL database programming, singleton mode, queue container, C++11 multithreading programming, thread mutual exclusion, thread synchronous communication (mutex, conditional variables) and unique_lock, CAS based atomic shaping, ...

1, Foreword   in the past, the sorting methods we studied were based on comparison, and their efficiency was either quadratic or logarithmic. Bucket sorting is based on container sorting, which is mainly divided into count sorting and cardinality sorting. This paper describes the knowledge of cardinality sorting.   the idea of ...