Module posix.sched
Kernel Thread Scheduling Priority.
 Where supported by the underlying system, functions to discover and
 change the kernel thread scheduling priority.  If the module loads
 successfully, but there is no kernel support, then posix.sched.version
 will be set, but the unsupported APIs will be nil.
Functions
| sched_getscheduler ([pid=0]) | get scheduling policy | 
| sched_setscheduler ([pid=0[, policy=`SCHED_OTHER`[, priority=0]]]) | set scheduling policy/priority | 
Constants
| posix.sched | Scheduler constants. | 
Functions
- sched_getscheduler ([pid=0])
- 
    get scheduling policy
    Parameters:- pid
            int
         process to act on, or 0for caller process (default 0)
 Returns:- 
           int
        scheduling policy 
 SCHED_FIFO,SCHED_RR,SCHED_OTHER, if successfulOr- nil
- string error message
- int errnum
 See also:
- pid
            int
         process to act on, or 
- sched_setscheduler ([pid=0[, policy=`SCHED_OTHER`[, priority=0]]])
- 
    set scheduling policy/priority
    Parameters:- pid
            int
         process to act on, or 0for caller process (default 0)
- policy
            int
         one of SCHED_FIFO,SCHED_RRorSCHED_OTHER(default `SCHED_OTHER`)
- priority
            int
         must be 0forSCHED_OTHER, or else a positive number below 100 for real-time policies (default 0)
 Returns:- 
           int
        
 0, if successfulOr- nil
- string error message
- int errnum
 See also:
- pid
            int
         process to act on, or 
Constants
- posix.sched
- 
    Scheduler constants.
Any constants not available in the underlying system will be nilvalued.Fields:- SCHED_FIFO int first-in, first-out scheduling policy
- SCHED_RR int round-robin scheduling policy
- SCHED_OTHER int another scheduling policy
 Usage:-- Print scheduler constants supported on this host. for name, value in pairs (require "posix.sched") do if type (value) == "number" then print (name, value) end end