4D v18
PROCESS PROPERTIES
- 4D Language Reference
-
- Processes
-
- Processes
- Preemptive 4D processes
- ABORT PROCESS BY ID
- Count tasks
- Count user processes
- Count users
- Current process
- Current process name
- DELAY PROCESS
- EXECUTE ON CLIENT
- Execute on server
- Get process activity
- GET REGISTERED CLIENTS
- New process
- PAUSE PROCESS
- Process aborted
- Process number
- PROCESS PROPERTIES
- Process state
- REGISTER CLIENT
- RESUME PROCESS
- UNREGISTER CLIENT
4D v18
PROCESS PROPERTIES
PROCESS PROPERTIES
| PROCESS PROPERTIES ( process ; procName ; procState ; procTime {; procMode {; uniqueID {; origin}}} ) | ||||||||
| Parameter | Type | Description | ||||||
| process | Longint |
|
Process number | |||||
| procName | String |
|
Process name | |||||
| procState | Longint |
|
Process state | |||||
| procTime | Longint |
|
Cumulative time taken by process in ticks | |||||
| procMode | Boolean, Longint |
|
If Boolean: Visible (True) or Hidden (False) If Longint (bit field): bit 0 = Visibility, bit 1 = Preemptive execution |
|||||
| uniqueID | Longint |
|
Unique process ID | |||||
| origin | Longint |
|
Origin of the process | |||||
The PROCESS PROPERTIES command returns various information about the process whose process number you pass in process.
Note: If the process does not exist, which means you did not pass in process a number in the range 1 to Count tasks, PROCESS PROPERTIES leaves the variable parameters unchanged.
After the call:
- procName returns the name of the process. Some things to note about the process name:
- If the process was started from the Execute Method dialog box (with the New Process option selected), its name is “P_” followed by a number.
- If the process was started from a custom menu item whose Start a New Process property is checked, the name of the process is “M_” or “ML_” followed by a number.
- If the process was started by the Web server, its name is "Web Process#" followed by an UUID.
- If the process has been aborted (and its “slot” not reused yet), the name of the process is still returned. To detect if a process is aborted, test procState=-1 (see below).
- procState returns the state of the process at the moment of the call. This parameter can return one of the values provided by the following predefined constants:
Constant Type Value Does not exist Longint -100 Aborted Longint -1 Executing Longint 0 Delayed Longint 1 Waiting for user event Longint 2 Waiting for input output Longint 3 Waiting for internal flag Longint 4 Paused Longint 5
- procTime returns the cumulative time that the process has used since it started, in ticks (1/60th of a second) .
- The optional procMode parameter can be a Boolean or longint type variable:
- If it is a Boolean type, it returns True if the process is visible and False if it is hidden.
- If it is a longint type, after the method is executed, it contains a bit field where the two first bits are set:
- bit 0 returns the visibility property: set to 1 if process is visible, and 0 if it is hidden
- bit 1 returns the preemptive mode property: set to 1 if process runs in preemptive mode, and 0 if it runs in cooperative mode. For more information, please refer to the Preemptive 4D processes section.
- uniqueID, if specified, returns the unique process number. Actually, each process has attributed a process number to it as well as a unique process number per session. The unique number allows you to differentiate between two processes or two process sessions. It corresponds to the process number having been started during 4D’s session.
- origin, if specified, returns a value that describes the origin of the process. 4D offers the following predefined constants (in the "Process Type" theme):
Constant Type Value Comment Apple event manager Longint -7 Backup process Longint -19 Cache manager Longint -4 Client manager process Longint -31 Compiler process Longint -29 Created from execution dialog Longint 3 Created from menu command Longint 2 Design process Longint -2 Event manager Longint -8 Execute on client process Longint -14 Execute on server process Longint 1 External task Longint -9 HTTP Log flusher Longint -58 Indexing process Longint -5 Internal 4D server process Longint -18 Internal timer process Longint -25 Log file process Longint -20 Main 4D process Longint -39 Main process Longint -1 Method editor macro process Longint -17 Monitor process Longint -26 MSC process Longint -22 None Longint 0 On exit process Longint -16 Other 4D process Longint -10 Other user process Longint 4 Restore Process Longint -21 Serial Port Manager Longint -6 Server interface process Longint -15 SOAP process Longint -33 SQL Method execution process Longint -24 Web process on 4D remote Longint -12 Web process with no context Longint -3 Web server process Longint -13 Worker process Longint 5 Worker process launched by user
Note: 4D’s internal processes return a negative value and the processes generated by the user return a positive value.
The following example returns the name, state, and time taken in the variables vName, vState, and vTimeSpent for the current process:
C_TEXT(vName) //Initialize the variables
C_LONGINT(vState)
C_LONGINT(vTime)
PROCESS PROPERTIES(Current process;vName;vState;vTimeSpent)See example for Semaphore.
You want to find out the visibility and execution mode of the current process. You can write:
C_TEXT(vName)
C_LONGINT(vState)
C_LONGINT(vTime)
C_LONGINT(vFlags)
C_BOOLEAN(isVisible)
C_BOOLEAN(isPreemptive)
PROCESS PROPERTIES(Current process;vName;vState;vTime;vFlags)
isVisible:=vFlags?? 0 //true if visible
isPreemptive:=vFlags?? 1 //true if preemptive
See also
Count tasks
Get process activity
Preemptive 4D processes
Process state
PROPERTIES
Product: 4D
Theme: Processes
Number:
336
HISTORY
Modified: 4D v11 SQL Release 3
Modified: 4D v15 R5
ARTICLE USAGE
4D Language Reference ( 4D v18)
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