C++ Memory Leak Check -


will leak memory:

std::string getstringfromuser(std::string sprompt, int nmaxbuffsize) {     int i, ch;     char *psbuffer = (char *) _alloca(nmaxbuffsize);     fprintf(stderr, "%s", sprompt.c_str());     fflush(stderr);     (i = 0; (i < nmaxbuffsize) && ((ch = getchar()) != eof) && (ch != '\n'); i++)     {         psbuffer[i] = (char) ch;     }     psbuffer[i] = '\0';     return (std::string) psbuffer;  } // getstringfromuser()

written 1 of betters, seems psbuffer never deleted.

no, there no memory leak in function , using alloca won't cause memory leak it's allocated on stack. http://www.gnu.org/software/libc/manual/html_mono/libc.html#variable-size-automatic:

3.2.5 automatic storage variable size

the function alloca supports kind of half-dynamic allocation in blocks allocated dynamically freed automatically.

allocating block alloca explicit action; can allocate many blocks wish, , compute size @ run time. blocks freed when exit function alloca called from, if automatic variables declared in function. there no way free space explicitly.


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