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[tombana]

Hi,
I'm currently using the 'new' operator in C++ to allocate memory, but I've seen a lot of different ways to do it:
1.

[BanMe]

the 'new' keyword relies on the CLR, which in turn max exe co-dependent on the load of CLR dll's and it get all bitchy when you remove the CLR from linking :p

i tend to use HeapCreate HeapAlloc HeapFree HeapDestroy
as those are not CLR dependent.

[nog_lorp]

malloc() and free() are the C style of heap allocation. HeapAlloc and HeapFree are the Win32 apis for C style heap management - in Win32 calls to malloc and free map directly into the Heap* functions (well, almost - malloc uses the heap that the process starts with by default, or creates a new heap if there is none yet).

[tombana]

So actually all those functions are some sort of wrappers, and will all result in a call to HeapAlloc on either the process' default heap or a created heap?
I guess I'll start using HeapAlloc then, as that also reduces the dependency on the CLR.
By the way, how do you completely 'disable' the CLR in C++. I use Microsoft Visual C++ 2008 Express Edition. What project options should I set in order to not link to any of those libraries?

[nog_lorp]

malloc has the advantage of being POSIX standard, if you want to be vaguely portable.

[BanMe]

XX = version number
add a 'D' for debug versions of same libs

i usually restrict all default imports and name a few others directly to make sure they dont link also to disable it completly u need to remove the buffer security check as it is also CLR dependent define your own EntryPoint in the 'link->system' tab (i think)


msvcrtXX.lib
LIBCMT.lib

[dkimxd]

when you free memory of a matrix, do you have to free each line seperately? Like in a 4 x 4 matrix. lets say A[4][4]. Can you just put free(A); and it will free all the memory in it or do you have to free each line one by one? like free(A[1]); free(A[2]); etc...

[sphere90]

[nog_lorp]

dkimxd: You need to call free once for every time you called malloc.