tkeyboard.c - plan9port - [fork] Plan 9 from user space
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       ---
       tkeyboard.c (735B)
       ---
            1 #include <u.h>
            2 #include <libc.h>
            3 #include <draw.h>
            4 #include <thread.h>
            5 #include <keyboard.h>
            6 
            7 void
            8 closekeyboard(Keyboardctl *kc)
            9 {
           10         Rune r;
           11 
           12         if(kc == nil)
           13                 return;
           14 
           15 /*        postnote(PNPROC, kc->pid, "kill"); */
           16 
           17         do; while(nbrecv(kc->c, &r) > 0);
           18         chanfree(kc->c);
           19         free(kc);
           20 }
           21 
           22 static
           23 void
           24 _ioproc(void *arg)
           25 {
           26         Rune r;
           27         Keyboardctl *kc;
           28 
           29         kc = arg;
           30         threadsetname("kbdproc");
           31         for(;;){
           32                 if(_displayrdkbd(display, &r) < 0)
           33                         threadexits("read error");
           34                 send(kc->c, &r);
           35         }
           36 }
           37 
           38 Keyboardctl*
           39 initkeyboard(char *file)
           40 {
           41         Keyboardctl *kc;
           42 
           43         kc = mallocz(sizeof(Keyboardctl), 1);
           44         if(kc == nil)
           45                 return nil;
           46         USED(file);
           47         kc->c = chancreate(sizeof(Rune), 20);
           48         chansetname(kc->c, "kbdc");
           49         proccreate(_ioproc, kc, 32*1024);
           50         return kc;
           51 }