JevGetClose
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Description
This function disconnects the program from the event server and closes the JP1-event acquisition handle returned by the JevGetOpen() function.
The JP1-event acquisition handle returned by the JevGetOpen() function must be closed by using the JevGetClose() function. In Windows, if the process terminates without calling this function, a system-resource leak error occurs.
Definition header
JevApi.h
Format
int JevGetClose(long* lplStatus,
JEVGETKEY key);
Arguments
lplStatus
In lplStatus, specify the pointer to the area for containing the status code that this function returns if the function abnormally terminates. The following explains the status codes that may be returned.
|
Status code |
Meaning |
|---|---|
|
JEV_S_CONNECT_ERROR |
Failed to connect the event server. |
|
JEV_S_PARAM_ERROR |
An invalid parameter is specified. |
|
JEV_S_MAXOPEN |
The number of opened files reached the maximum. |
|
JEV_S_NOMEMORY |
Memory is insufficient. |
|
JEV_S_IO_ERR |
An I/O error occurred. |
|
JEV_S_SYSTEM_ERROR |
A system error occurred (the system resource became insufficient). |
key
In key, specify the handle for acquiring the target JP1 event (returned by the JevGetOpen() function).
Return values
|
Situation |
Explanation |
|---|---|
|
Normal termination |
The function returns 0. |
|
Abnormal termination |
The function returns -1. Also, in the area specified in lplStatus, the function stores the detailed error code. |