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SwRI can revise these Terms at any time * without notice by updating this posting. * * Trademarks * * The SwRI logo is a trademark of SwRI in the United States and other countries. * */ #ident "@(#) valid_idf_data.c 1.1 05/08/19 SwRI" #include "libbase_idfs.h" /******************************************************************************* * * * VALID_IDF_DATA_STRUCTURE SUBROUTINE * * * * DESCRIPTION * * This routine is called to verify that the address of the data structure * * passed in is an "active" data structure; that is, that the memory address * * has not been freed. This module is needed for SCF processing since SCF * * invokes free_experiment_info() which frees memory for all allocated data * * structures to date. Since the address is returned when the data structure * * is allocated and this address is copied to a variable maintained by the * * application, the variable is not modified when the memory is freed to * * indicate that the address is no longer active. * * * * INPUT VARIABLES * * void *idf_data_ptr ptr to the memory location that holds the * * address of the structure that holds returned* * data values (read_drec) * * * * USAGE * * x = valid_idf_data_structure (idf_data_ptr) * * * * NECESSARY SUBPROGRAMS * * None * * * * EXTERNAL VARIABLES * * struct general_info ginfo structure that holds information concerning * * the experiment that is being processed * * * * INTERNAL VARIABLES * * register SDDAS_LONG loop looping variable * * * * SUBSYSTEM * * Display Level * * * ******************************************************************************/ SDDAS_BOOL valid_idf_data_structure (void *idf_data_ptr) { extern struct general_info ginfo; register SDDAS_LONG loop; /*************************************************************************/ /* Look for the address in "active" set of allocated addresses. */ /* This decreasing loop is supposed to be faster than increasing loop. */ /*************************************************************************/ for (loop = ginfo.num_idf_data_ptr; loop--; ) { if (*(ginfo.idf_data_ptr + loop) == idf_data_ptr) return (sTrue); } return (sFalse); }