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[FreeRTOS Home] [Live FreeRTOS Forum] [FAQ] [Archive Top] [March 2009 Threads] Type conflicts of xQueueHandlePosted by barry bridges on March 12, 2009 Hi all, Having a few probs with Queues at the moment, silly ones now doubt.
I'm running IAR version 4 with Sam7x256. The problem i'm having is the compiler doesnt know what xQueueHandle is, theres two in the queue.c/.h.
one is "typedef xQUEUE * xQueueHandle;" the other is "typedef void * xQueueHandle;"
and i get the following, plus others
Warning[w6]: Type conflict for external/entry "xQueueCreate", in module CanControl against external/entry in module queue; function return types are different; different basic types
Anyone got any ideas?
Many thanks
Barry
RE: Type conflicts of xQueueHandlePosted by Richard on March 12, 2009 This is deliberate data hiding. The IAR compiler is just very pedantic. Turn the warning off.
Regards.
RE: Type conflicts of xQueueHandlePosted by rpike on March 18, 2009 You can modify queue.c to eliminate the warning AND preserve the data hiding.
Change queue.c so that it #includes queue.h. Now all the queue functions use the same typedef that your client code does (xQueueHandle is void*).
Change the typedef in queue.c to something like: typedef xQUEUE xRealQueueHandle;
Now change all of the functions in queue.c that take an xQueueHandle parameter or return an xQueueHandle and cast the void pointer to xRealQueueHandle.
-rp
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