C++ template in memory-mapped master

[Altera_Forum]

#include <iostream># include <stdio.h># include <stdlib.h># include "HLS/hls.h" 

  using namespace std; using namespace ihc;   typedef mm_master<unsigned int, dwidth<32>, awidth<64>, aspace<1>, latency<0>, maxburst<1> > mm_src_t; typedef mm_master<unsigned int, dwidth<32>, awidth<64>, aspace<3>, latency<0>, maxburst<1> > mm_dst_t;  # define SEED 3# define NUM_SAMPLES 8 //#define DUMP_BUFFERS   int verify_data(int *src, int *dst, int count, unsigned int x=0) {  int errors = 0;  for(int i = 0; i < count; i++) {  if(dst != (src + x)) {  errors++;  printf("mismatch at index %d: 0x%llx != 0x%llx\n", i, (unsigned long long)dst, (unsigned long long)src + x);  }  }  return errors; }   template<typename T> void dump_buffers(const char* title, T *ref, T *dst, unsigned size) {# ifdef DUMP_BUFFERS  // Title  printf("%s:\n", title);  if(size == 0) return;  // Reference  printf(" REF:");  for(unsigned i=0; i<size-1; ++i) {  printf(" 0x%04x,", ref);  if(i % 8 == 7) printf("\n ");  }  printf(" 0x%04x\n", ref);  // destination  printf(" dst:");  for(unsigned i=0; i<size-1; ++i) {  printf(" 0x%04x,", dst);  if(i % 8 == 7) printf("\n ");  }  printf(" 0x%04x\n", dst);# endif }   component void add_x(mm_src_t &src, mm_dst_t &dst, unsigned int x) {  *dst = *src + x; }   int main () {  int x = 0;  int errors = 0;  int src_mem[NUM_SAMPLES];  int dst_mem[NUM_SAMPLES];    // initialize data  srand(SEED);  for (int i=0; i<NUM_SAMPLES; ++i) {  src_mem = rand() % 2048;  dst_mem = -1;  }  dump_buffers("Initial", src_mem, dst_mem, NUM_SAMPLES);      /*  1)  This code creates a new mm_master interface for each iteration of the loop.  */  x = 0x10;  for (int i=0; i<NUM_SAMPLES; ++i) {  mm_src_t src_mm_i(&src_mem, 1*sizeof(int));  mm_dst_t dst_mm_i(&dst_mem, 1*sizeof(int));  ihc_hls_enqueue_noret(&add_x, src_mm_i, dst_mm_i, x);  }  ihc_hls_component_run_all(add_x);  dump_buffers("New mm_master for each index", src_mem, dst_mem, NUM_SAMPLES);  errors += verify_data(src_mem, dst_mem, NUM_SAMPLES, x);      /*  2)  This code demonstartes use of the getInterfaceAtIndex() function which can  be used to index into a mm_master object. This can be useful when iterating  over an array and invoking a component on different indices of the array.  */  x = 0x20;  mm_src_t src_mm(src_mem, NUM_SAMPLES*sizeof(int));  mm_dst_t dst_mm(dst_mem, NUM_SAMPLES*sizeof(int));  for (int i=0; i<NUM_SAMPLES; ++i) {  ihc_hls_enqueue_noret(&add_x, src_mm.getInterfaceAtIndex(i), dst_mm.getInterfaceAtIndex(i), x);  }  ihc_hls_component_run_all(add_x);  dump_buffers("Use getInterfaceAtIndex()", src_mem, dst_mem, NUM_SAMPLES);  errors += verify_data(src_mem, dst_mem, NUM_SAMPLES, x);      if (errors) {  printf("FAILED with %d errors\n", errors);  } else {  printf("PASSED\n");  } }

[Altera_Forum]

Hello, 

If you want to understand what the general objective of templates use is. https://www.tutorialspoint.com/cplusplus/cpp_templates.htm Best Regards, Johi.

[Altera_Forum]

--- Quote Start ---  Hello, If you want to understand what the general objective of templates use is. https://www.tutorialspoint.com/cplusplus/cpp_templates.htm Best Regards, Johi.  --- Quote End ---     Thanks Johi for the reply...Actually my question is only regarding to the usage of of C++ template specific to this code. I am aware of C++ template concept but somehow struggling to understand the reason of C++ template usage in this code..... :)