Embedded Programming with Modern C++ Cookbook

How to do it...

In this recipe, we will learn how to preallocate memory and use it later in your application:

1. In your working ~/test directory, create a subdirectory called prealloc.
2. Use your favorite text editor to create a file called prealloc.cpp in the prealloc subdirectory. Copy the following code snippet into the prealloc.cpp file to define a SerialDevice class:

#include <cstdint>#include <string.h>constexpr size_t kMaxFileNameSize = 256;constexpr size_t kBufferSize = 4096;constexpr size_t kMaxDevices = 16;class SerialDevice {    char device_file_name[256];    uint8_t input_buffer[kBufferSize];    uint8_t output_buffer[kBufferSize];    int file_descriptor;    size_t input_length;    size_t output_length;  public:    SerialDevice(): file_descriptor(-1), ...