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QuestionTo insert a node at the back of a XOR doubly linked list Pin
Tarun Jha17-Oct-19 9:38
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AnswerRe: To insert a node at the back of a XOR doubly linked list Pin
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QuestionWhy non-template function does not compile where as template function compiles? Pin
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AnswerRe: Why non-template function does not compile where as template function compiles? Pin
Richard MacCutchan2-May-19 23:29
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AnswerRe: Why non-template function does not compile where as template function compiles? Pin
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QuestionAdvice on interdependent asynchronous functions and task queuing? Pin
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QuestionRecommended way to deal with queues and pointers to buffers Pin
arnold_w3-Feb-19 9:09
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AnswerRe: Recommended way to deal with queues and pointers to buffers Pin
Richard MacCutchan3-Feb-19 22:19
mveRichard MacCutchan3-Feb-19 22:19 
GeneralRe: Recommended way to deal with queues and pointers to buffers Pin
arnold_w3-Feb-19 23:40
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GeneralRe: Recommended way to deal with queues and pointers to buffers Pin
Richard MacCutchan3-Feb-19 23:48
mveRichard MacCutchan3-Feb-19 23:48 
GeneralRe: Recommended way to deal with queues and pointers to buffers Pin
arnold_w4-Feb-19 3:15
Memberarnold_w4-Feb-19 3:15 
I don't think I can guarantee that the static non-queued buffers can be put in the end of the structs because most of the time the structs will be created on the stack. Therefore, I think I need pointers to the buffers.

I also have a CAN-bus interface and typically the receive packet task would take a struct that looks like this:
struct packet_s {
    uint32_t  extID;
    uint8_t   DLC;    // Data Length Count (=size of packet in bytes)
    uint8_t*  data;
};
In my application these packets will always be queued (they never use static buffers) and as soon as they are queued the data pointer becomes worthless. The best thing I can think of is the following (a slight variation of Richard MacCutchan's suggestion):
#define PLEASE_SEE_DLC_FOR_PACKET_SIZE     (1)

struct packet_s {
    uint32_t  extID;
    uint8_t   DLC;    // Data Length Count (=size of packet in bytes)
    uint8_t   data[PLEASE_SEE_DLC_FOR_PACKET_SIZE];
};


modified 4-Feb-19 9:27am.

GeneralRe: Recommended way to deal with queues and pointers to buffers Pin
Richard MacCutchan4-Feb-19 3:46
mveRichard MacCutchan4-Feb-19 3:46 
GeneralRe: Recommended way to deal with queues and pointers to buffers Pin
arnold_w4-Feb-19 3:55
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GeneralRe: Recommended way to deal with queues and pointers to buffers Pin
Richard MacCutchan4-Feb-19 4:04
mveRichard MacCutchan4-Feb-19 4:04 
GeneralRe: Recommended way to deal with queues and pointers to buffers Pin
Business2sell18-Feb-19 18:08
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QuestionCan a union in standard C "skip" members? Pin
arnold_w31-Jan-19 22:46
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AnswerRe: Can a union in standard C "skip" members? Pin
Richard MacCutchan31-Jan-19 23:18
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GeneralRe: Can a union in standard C "skip" members? Pin
arnold_w31-Jan-19 23:47
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GeneralRe: Can a union in standard C "skip" members? Pin
Richard MacCutchan31-Jan-19 23:52
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GeneralRe: Can a union in standard C "skip" members? Pin
arnold_w1-Feb-19 0:13
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GeneralRe: Can a union in standard C "skip" members? Pin
Richard MacCutchan1-Feb-19 1:42
mveRichard MacCutchan1-Feb-19 1:42 

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