Ok, according to my OReilly "Programming PHP" book by Rasmus Lerdorf, the emalloc and efree functions work exactly the same as malloc and free. It says:
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if you emalloc() something and forget to efree() it, PHP prints a leak warning like this if you are running in debug mode (enabled by compiling PHP with the --enable-debug switch):
foo.c(123) : Freeing 0x0821E5FC (20 bytes), script=foo.php
Last leak reported 1 time
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so the docs do not agree... Im more apt to believe the book I have, since it goes on like this for a few pages about tracking down memory leaks... plus Rasmus wrote it ;)
The reason why in your code there is no 'efree' is because of the '0' flag passed to 'RETURN_STRINGL'. If that was a '1', they would have to efree it.
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Brian 'Bex' Huff
[EMAIL PROTECTED]
Phone: 952-903-2023
Fax: 952-829-5424
Mikey wrote:
Im pretty sure you still need to 'efree' what you 'emalloc'. Every time I forgot to 'efree' something, I would get a bunch of error messages about memory leaks. The errors were nice and verbose, tho... as long as I was running the debug version of the dlls.Which is what I would have assumed, but for what I read in the manual.So either the documentation is wrong, and you have to efree everything... or else the error messages about memory leaks that I keep getting can be ignored... I'd be curious to know the answer as well...Well, I decided to see how the big boys dealt with strings, and had a root around ext/standard. The following function is from string.c: PHP_FUNCTION(bin2hex) { zval **data; char *result; size_t newlen; if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &data) == FAILURE) { WRONG_PARAM_COUNT; } convert_to_string_ex(data); result = php_bin2hex(Z_STRVAL_PP(data), Z_STRLEN_PP(data), &newlen); if (!result) { RETURN_FALSE; } RETURN_STRINGL(result, newlen, 0); } As you can see, result is emalloc()'d, but not efree()'d at the end - looks like the docs are right. I have since tried using this approach in a test function and do not get any errors when I compile - what do you use for your build? regards, Mikey
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