By STICHBURY JO
This publication explains the foremost positive factors of Symbian OS and should assist you to write down potent C++ code. It specializes in elements of excellent C++ kind that observe fairly to Symbian OS.
21 goods are used to focus on specific facets of the working method and supply an easy and easy exploration of coding basics. utilizing instance code and outlines of most sensible perform to deconstruct Symbian OS, the goods advisor you to what you need to and shouldn't do (and why), declaring commonly-made errors alongside the best way.
applied sciences coated comprise:
- client-server structure
- descriptors and dynamic boxes
- active gadgets, threads and tactics
- leaves, cleanup stack and 2-phase development
- thin templates, sturdy API layout, reminiscence optimization, debug and try out macros
- the ECOM plug-in framework
Symbian OS defined could be learn cover-to-cover or dipped into as a reference that would increase your code type while programming with Symbian OS.
Read or Download Symbian OS Explained. Effective C++ Programming For Smartphones PDF
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Additional resources for Symbian OS Explained. Effective C++ Programming For Smartphones
This could potentially cause unexpected or different behavior between zero-ﬁlled heap-based and non-zeroed stack-based objects. For this reason, among others such as managing cleanup in the event of a leave, objects of a C class must always be allocated on the heap. Clearly, when it is no longer needed, a heap-based object must be destroyed. Objects of C classes typically exist either as pointer members of another class or are accessed by local pointer variables. If owned, the CBase-derived object should be destroyed by a call to delete, for example in the destructor of the owning class.
TAny* should be used in preference to void*, effectively replacing it with a typedef’d ”pointer to anything”. TAny is thus equivalent to void but, in the context where void means ”nothing”, it is not necessary to replace the native void type. Thus, a function taking a void* pointer (to anything) and returning void (nothing) will typically have a signature as follows on Symbian OS: void TypicalFunction(TAny* aPointerParameter); This is the one exception to the rule of replacing a native type with a Symbian OS typedef; it occurs because void is effectively compiler-independent when referring to ”nothing”.
H). This class has two characteristics which are inherited by its subtypes and thus guaranteed for every C class. Firstly, CBase has a virtual destructor so a CBase-derived object may be destroyed properly by deletion through a CBase pointer. This 2 In case you are wondering, the ”C” stands for ”Class”, which perhaps makes a ”C class” something of a tautology, though it is an accurate reﬂection of the fact that it is more than the simple ”Type” described by a T class. C CLASSES 5 is common when using the cleanup stack, since the function invoked when pushing a CBase-derived object onto the cleanup stack is the CCleanupStack::PushL(CBase* aPtr) overload.