gtpc2mec | C/C++ Language Support User's Guide |
This function reinitializes a collection and discards any elements in the collection.
Format
#include <c$to2.h> long TO2_makeEmpty (const TO2_PID_PTR pid_ptr, TO2_ENV_PTR env_ptr);
Normal Return
The normal return is a positive value.
Error Return
An error return is indicated by a zero. When zero is returned, use the TO2_getErrorCode function to determine the specific error code. For more information, see Error Handling.
The following error codes are common for this function:
TO2_ERROR_ENV
TO2_ERROR_METHOD
TO2_ERROR_PID
TO2_ERROR_ZERO_PID
Programming Considerations
A commit scope will be created for the TO2_makeEmpty request. If the request is successful, the scope will be committed. If an error occurs while processing the TO2_makeEmpty request, the scope will be rolled back.
Examples
The following example deletes all the elements from a collection.
#include <c$to2.h> /* Needed for TO2 API functions */ #include <stdio.h> /* APIs for standard I/O functions */ TO2_ENV_PTR env_ptr; /* PTR to the TO2 environment */ TO2_PID collect; /* PTR to PID return field */
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if (TO2_makeEmpty(&collect, env_ptr) == TO2_ERROR) { printf("TO2_makeEmpty failed!\n"); process_error(env_ptr); } else { printf("TO2_makeEmpty successful!\n"); }
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