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// SPDX-License-Identifier: BSD-3-Clause
/* Copyright (C) 2021 Intel Corporation. */
#include <assert.h>
#include <memkind.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/mman.h>
#define FIXED_MAP_SIZE (1024 * 1024 * 32)
static void print_err_message(int err)
{
char error_message[MEMKIND_ERROR_MESSAGE_SIZE];
memkind_error_message(err, error_message, MEMKIND_ERROR_MESSAGE_SIZE);
fprintf(stderr, "%s\n", error_message);
}
int main(int argc, char *argv[])
{
struct memkind *fixed_kind = NULL;
int err = 0;
void *addr = mmap(NULL, FIXED_MAP_SIZE, PROT_READ | PROT_WRITE,
MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
assert(addr != MAP_FAILED);
// create kind on mmapped area
err = memkind_create_fixed(addr, FIXED_MAP_SIZE, &fixed_kind);
if (err) {
print_err_message(err);
return 1;
}
char *fixed_str1 = NULL;
char *fixed_str2 = NULL;
char *fixed_str3 = NULL;
char *fixed_str4 = NULL;
// Allocate 512 Bytes of 32 MB available
fixed_str1 = (char *)memkind_malloc(fixed_kind, 512);
if (fixed_str1 == NULL) {
fprintf(stderr, "Unable to allocate fixed string (fixed_str1).\n");
return 1;
}
// Allocate 8 MB of 31.9 MB available
fixed_str2 = (char *)memkind_malloc(fixed_kind, 8 * 1024 * 1024);
if (fixed_str2 == NULL) {
fprintf(stderr, "Unable to allocate fixed string (fixed_str2).\n");
return 1;
}
// Allocate 16 MB of 23.9 MB available
fixed_str3 = (char *)memkind_malloc(fixed_kind, 16 * 1024 * 1024);
if (fixed_str3 == NULL) {
fprintf(stderr, "Unable to allocate fixed string (fixed_str3).\n");
return 1;
}
// Allocate 16 MB of 7.9 MB available - Out Of Memory expected
fixed_str4 = (char *)memkind_malloc(fixed_kind, 16 * 1024 * 1024);
if (fixed_str4 != NULL) {
fprintf(
stderr,
"Failure, this allocation should not be possible (expected result was NULL).\n");
return 1;
}
sprintf(fixed_str1, "Hello world from fixed - fixed_str1.\n");
sprintf(fixed_str2, "Hello world from fixed - fixed_str2.\n");
sprintf(fixed_str3, "Hello world from mmapped memory - fixed_str3.\n");
fprintf(stdout, "%s", fixed_str1);
fprintf(stdout, "%s", fixed_str2);
fprintf(stdout, "%s", fixed_str3);
memkind_free(fixed_kind, fixed_str1);
memkind_free(fixed_kind, fixed_str2);
memkind_free(fixed_kind, fixed_str3);
err = memkind_destroy_kind(fixed_kind);
if (err) {
print_err_message(err);
return 1;
}
fprintf(stdout, "Memory was successfully allocated and released.\n");
munmap(addr, FIXED_MAP_SIZE);
return 0;
}
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