childProcess.c File Reference

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Detailed Description

Implementation file for the child process accounting functions.

Definition in file childProcess.c.

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Functions
int	cpInitChildProcessData (void)
	Initialize the internal accounting data structures.
void	cpKillChildProcessData (void)
	Deinitialize the internal accounting data structures.
cpChildProcess *	cpFindChildProcess (pid_t child_pid)
	Find the cpChildProcess structure that corresponds to the given ID.
cpChildProcess *	cpCreateChildProcess (pid_t child_pid)
	Create a cpChildProcess object for a child that does not have one yet.
void	cpDeleteChildProcess (struct cpChildProcess *cp)
	Delete the given cpChildProcess object.
int	cpOpenOutput (struct cpChildProcess *cp, const char *base_name, struct timeval *start_time)
	Open and initialize the statistics output file for the given cpChildProcess object.
unsigned long long	cpSampleUsage (struct cpChildProcess *cp, struct timeval *run_time)
	Sample the resource usage for a given child process.
Variables
cpChildProcessData	child_process_data
	Global data for child processes.

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Function Documentation

struct cpChildProcess* cpCreateChildProcess (  pid_t  child_pid  )

Create a cpChildProcess object for a child that does not have one yet. Parameters: child_pid  The child process to track. Returns: The newly created object or NULL if a problem was encountered during creation. Definition at line 90 of file childProcess.c. References child_process_data, cpFindChildProcess(), ensure, lnAddTail(), and require. Referenced by sigalrm().

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void cpDeleteChildProcess (  struct cpChildProcess *  cp  )

Delete the given cpChildProcess object. Parameters: cp  NULL or a previously created cpChildProcess object. Definition at line 119 of file childProcess.c. References child_process_data, cpFindChildProcess(), ensure, lnRemove(), and require. Referenced by cpKillChildProcessData().

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struct cpChildProcess* cpFindChildProcess (  pid_t  child_pid  )

Find the cpChildProcess structure that corresponds to the given ID. Parameters: child_pid  The child process to track. Returns: The cpChildProcess object that corresponds to the given ID or NULL if one has not been created yet. Definition at line 71 of file childProcess.c. References child_process_data, and require. Referenced by cpCreateChildProcess(), cpDeleteChildProcess(), cpOpenOutput(), cpSampleUsage(), and sigalrm().

int cpInitChildProcessData (  void   )

Initialize the internal accounting data structures. Returns: True on success, false otherwise. Definition at line 44 of file childProcess.c. References child_process_data, lnNewList(), and require.

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int cpOpenOutput (  struct cpChildProcess *  cp, const char *  base_name, struct timeval *  start_time )

Open and initialize the statistics output file for the given cpChildProcess object. The created file will have the form "<base_name>-<pid>.out". Parameters: cp  A valid cpChildProcess object. base_name  The file name prefix. start_time  The start time for the parent process. Returns: True if the file was created successfully, false otherwise. Definition at line 142 of file childProcess.c. References child_process_data, cpFindChildProcess(), and require. Referenced by sigalrm().

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unsigned long long cpSampleUsage (  struct cpChildProcess *  cp, struct timeval *  run_time )

Sample the resource usage for a given child process. Parameters: cp  A valid cpChildProcess object. run_time  The amount of time the parent process has been running. Returns: The CPU usage, in microseconds, for the given child process. Definition at line 307 of file childProcess.c. References child_process_data, cpFindChildProcess(), pp_block, and require. Referenced by sigalrm().

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