Get the current scheduling policy for a process
#include <sched.h> int sched_getscheduler( pid_t pid );
- The ID of the process whose scheduling policy you want to find, or zero if you want to get the policy for the current process.
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The sched_getscheduler() function gets the current scheduling policy of process pid. If pid is zero, the scheduling policy of the calling process is returned.
The scheduling policy, or -1 if an error occurred (errno is set).
- The process pid doesn't exist.
Currently, the implementation of sched_getscheduler() isn't 100% POSIX 1003.1-1996. The sched_getscheduler() function returns the scheduling policy for thread 1 in the process pid, or for the calling thread if pid is 0.
If you depend on this in new code, it will not be portable. POSIX 1003.1 says sched_getscheduler() should return -1 and set errno to EPERM in a multithreaded application.