How much memory locked in a process
You will probably need to check for each system and implement it accordingly. On Linux:
cat /proc/$PID/status | grep VmLck
You will probably need to do the same in C (read /proc line by line and search for VmLck), as this information is created in the function task_mem (in array.c) which I don't think you can access directly. Something like:
#include <unistd.h>#include <stdlib.h>#include <stdio.h>char cwd[PATH_MAX];sprintf(cwd, "/proc/%d/status", getpid());FILE* fp = fopen(cwd, "r");if(!fp) { exit(EXIT_FAILURE);}while((read = getline(&line, &len, fp)) != -1) { // search for line starting by "VmLck"}