December 22nd, 2012, 12:32 AM
[RESOLVED] Validity of new/delete pair (or malloc/free) after pointer casting
Pretty much a simple question, but I wanted to confirm what I think I understood from reading elsewhere:
Goal: To allocate some memory as a char*, read in some binary data, re-interpret it as a float* and then free the memory.
My code looks like:
Is the cast back to char* necessary on the red line (or could I have validly left it as float*)? Would it be different if I had written char * tmp = (char*)malloc(sizeof(char)*1000); on the blue line (and correspondingly used free (char*)floatData on the red line?
void someFunction(float* &result)
char * tmp = new char;
//...Fill the char buffer here...
result = (float*)tmp; //Reinterpret binary data as floats
float * floatData;
delete (char*)floatData; //Release the memory
Thanks for any guidance you might have.
Last edited by BioPhysEngr; December 22nd, 2012 at 12:50 AM.
Reason: Ah, my original code will segfault. Corrected syntax to pass the result pointer by referece.
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