Commit | Line | Data |
---|---|---|
d4ee6ee2 JM |
1 | #include "CallbackStream.h" |
2 | #include "Kernel.h" | |
61134a65 | 3 | #include <stdio.h> |
d4ee6ee2 | 4 | |
61134a65 | 5 | #define DEBUG_PRINTF printf |
d4ee6ee2 JM |
6 | |
7 | CallbackStream::CallbackStream(cb_t cb, void *u) | |
8 | { | |
9 | DEBUG_PRINTF("Callbackstream ctor: %p\n", this); | |
10 | callback= cb; | |
11 | user= u; | |
12 | closed= false; | |
13 | use_count= 0; | |
14 | } | |
15 | ||
16 | CallbackStream::~CallbackStream() | |
17 | { | |
18 | DEBUG_PRINTF("Callbackstream dtor: %p\n", this); | |
19 | } | |
20 | ||
21 | int CallbackStream::puts(const char *s) | |
22 | { | |
23 | if(closed) return 0; | |
24 | ||
25 | if(s == NULL) return (*callback)(NULL, user); | |
26 | ||
27 | int len = strlen(s); | |
28 | int n; | |
29 | do { | |
30 | // call this streams result callback | |
31 | n= (*callback)(s, user); | |
32 | ||
33 | // if closed just pretend we sent it | |
34 | if(n == -1) { | |
35 | closed= true; | |
36 | return len; | |
37 | ||
38 | }else if(n == 0) { | |
39 | // if output queue is full | |
40 | // call idle until we can output more | |
41 | THEKERNEL->call_event(ON_IDLE); | |
42 | } | |
43 | } while(n == 0); | |
44 | ||
45 | return len; | |
46 | } | |
47 | ||
48 | void CallbackStream::mark_closed() | |
49 | { | |
50 | closed= true; | |
51 | if(use_count <= 0) delete this; | |
52 | } | |
53 | void CallbackStream::dec() | |
54 | { | |
55 | use_count--; | |
56 | if(closed && use_count <= 0) delete this; | |
57 | } | |
58 | ||
59 | extern "C" void *new_callback_stream(cb_t cb, void *u) | |
60 | { | |
61 | return new CallbackStream(cb, u); | |
62 | } | |
63 | ||
64 | extern "C" void delete_callback_stream(void *p) | |
65 | { | |
66 | // we don't delete it in case it is still on the command queue | |
67 | ((CallbackStream*)p)->mark_closed(); | |
68 | } |