90 lines
1.6 KiB
C
90 lines
1.6 KiB
C
//
|
|
// Created by Akilan on 07/03/2024.
|
|
//
|
|
|
|
#include <stddef.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sys/mman.h>
|
|
|
|
#include <dlfcn.h>
|
|
#include <sys/fcntl.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
#include <fcntl.h>
|
|
#include <sys/wait.h>
|
|
|
|
#include <assert.h>
|
|
#include <sys/time.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
|
|
#define FILENAME "/dev/contigmem"
|
|
|
|
|
|
|
|
static inline void *MALLOC(size_t size)
|
|
{
|
|
// void * temp = malloc(size);
|
|
// assert(temp);
|
|
// return temp;
|
|
|
|
// Ensuring malloc this is mmap and phyiscally contigous
|
|
|
|
// void *ptr = malloc(size);
|
|
// return ptr;
|
|
}
|
|
|
|
// Currently not implementing free
|
|
// This is to ensure the PureCap
|
|
// program can terminate itself
|
|
// even though there is memory not
|
|
// cleared.
|
|
static inline void *FREE(void *ptr)
|
|
{
|
|
// int *pt = ptr;
|
|
// size_t size;
|
|
// --pt;
|
|
// size = *pt;
|
|
// if(munmap(pt, size) == -1)
|
|
// {
|
|
// perror("munmap");
|
|
// exit(EXIT_FAILURE);
|
|
// }
|
|
// free(ptr);
|
|
}
|
|
|
|
|
|
inline void *MALLOCPHYSICALLCONTIGOUS(size_t size) {
|
|
int fd = open
|
|
(FILENAME, O_RDWR | O_CREAT, 0600);
|
|
if (fd < 0) {
|
|
perror("open");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
off_t offset = 0; // offset to seek to.
|
|
|
|
if (ftruncate(fd, size) < 0) {
|
|
perror("ftruncate");
|
|
close(fd);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
int *ptr = mmap(NULL, size,
|
|
PROT_READ | PROT_WRITE, MAP_SHARED,
|
|
fd, offset);
|
|
if(ptr == MAP_FAILED)
|
|
{
|
|
perror("mmap");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
*ptr = size;
|
|
|
|
return ptr;
|
|
}
|
|
|