In this article, we are going to discuss how to use the mmap() function in Linux. So, let’s get started. Header File: #include <sys/mman.h> Syntax: void * mmap (void *address, size_t length, int protect, int flags, int filedes, off_t offset) Arguments: The function takes ...
Use thegetaddrinfoFunction to Host Name to IP Address in C getaddrinfois part of the UNIX networking programming facilities, and it can convert network host information to the IP address and conversely.getaddrinfois also a POSIX compliant function call, and it can do conversion regardless of ...
process the user input until the new line orEOFis encountered, there are no guarantees it will fit in the fixed-sizecharbuffer. If we have to use a fixed buffer, we are responsible for keeping a count of the input size and stopping storing it in the buffer after the capacity is reached...
Thefread()function is important for programs that need to access and manipulate binary data. When paired with other library functions, it is extremely helpful. The function is relatively simple to use and can be tailored to a program’s specific needs with the addition of optional arguments....
TheRegistercallbackfeature allows you to register a custom callback for interruptions from a specific peripheral. This means you can use a custom function as the callback for any desired peripheral interrupt source in your project. In this demonstration, we use the STLINK VCOM Port connected to...
从实际应用中我们可以看到function需要能够存储构造它的可调用对象的状态,而且可调用对象可能是多样的,各种可调用的类或者函数;一种比较容易理解的实现方案是这样的,每个function在实例化的时候,会构造对应的一个子类并实例化存在堆上,然后对于function本身来说,只存储一个父类的指针。这样的话,在function的调用过程中,...
recv(remoteSocket,(char *)&buffer,sizeof(buffer)-1,MSG_PEEK); Use either of the following methods, depending on whether there is data pending to be read or not: If no data is pending to be read, call the SetEvent function to set the specified event obje...
Optionally, for an absent device, call the CM_Get_Device_ID function to obtain the device instance ID and to display the ID before you remove the information. For the absent device, use the class information that you obtained in step 1 and the instance...
Introduction to C++ free() free() function in C++ <cstdlib> library is used to deallocate a memory block in C++. Whenever we call malloc, calloc or realloc function to allocate a memory block dynamically in C++, compiler allocates a block of size bytes of memory and returns a pointer to...
Parameter type lists and return types in a function declarator Type definitions Cast operators Thesizeofoperators Compound literals Thetypeofargument The compiler accepts this keyword in combination with double underscores:__typeof,__typeof__. The examples in this article do not make use of the do...