Re: CW 9.2 STL memory question.
VecP p = new Vec[64k] in this case push_back elements will be allocated on the heap. Vec v = Vec[64k] in this case, on the stack, right? Thanks, Vytautas it works, when allocating in this way - Vec v = Vec[64k]. Why? The vector implementation in MSL doesn't allocate memory until an element has been modified or accessed. This is for efficiency -- you can create a vector and if you don't use it, you don't have the allocation overhead. -- Ben Combee [EMAIL PROTECTED] CodeWarrior for Palm OS technical lead Palm OS programming help @ www.palmoswerks.com -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Re: CW 9.2 STL memory question.
At 02:41 AM 11/6/2003, Vytautas Leonavicius wrote: VecP p = new Vec[64k] in this case push_back elements will be allocated on the heap. Vec v = Vec[64k] in this case, on the stack, right? right... of course, it is better to use the syntax Vec v(64); as that's constructor initialization, and may avoid the creation of a temporary object and the call of a copy constructor which can happen with the Vec v = Vec(64); syntax. -- Ben Combee [EMAIL PROTECTED] CodeWarrior for Palm OS technical lead Palm OS programming help @ www.palmoswerks.com -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Re: CW 9.2 STL memory question.
At 03:12 AM 11/5/2003, Vytautas Leonavicius wrote: Hello, Well, MemPtrNew allocates a maximum of ~64Kb. But when I allocate std::vector on the stack, I got bad_alloc if I try to allocate more than ~30Kb. But if I use new on vector, that is: The stack on Palm OS apps is limited to around 4K. VecP p = new Vec[64k] it works, when allocating in this way - Vec v = Vec[64k]. Why? The vector implementation in MSL doesn't allocate memory until an element has been modified or accessed. This is for efficiency -- you can create a vector and if you don't use it, you don't have the allocation overhead. -- Ben Combee [EMAIL PROTECTED] CodeWarrior for Palm OS technical lead Palm OS programming help @ www.palmoswerks.com -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
