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https://github.com/9fans/plan9port.git
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54 lines
716 B
C
54 lines
716 B
C
#include <u.h>
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#include <libc.h>
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#define NEXIT 33
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static Lock onexlock;
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static struct
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{
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void (*f)(void);
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int pid;
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}onex[NEXIT];
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int
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atexit(void (*f)(void))
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{
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int i;
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lock(&onexlock);
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for(i=0; i<NEXIT; i++)
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if(onex[i].f == 0) {
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onex[i].pid = getpid();
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onex[i].f = f;
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unlock(&onexlock);
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return 1;
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}
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unlock(&onexlock);
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return 0;
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}
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void
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atexitdont(void (*f)(void))
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{
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int i, pid;
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pid = getpid();
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for(i=0; i<NEXIT; i++)
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if(onex[i].f == f && onex[i].pid == pid)
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onex[i].f = 0;
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}
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void
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exits(char *s)
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{
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int i, pid;
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void (*f)(void);
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pid = getpid();
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for(i = NEXIT-1; i >= 0; i--)
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if((f = onex[i].f) && pid == onex[i].pid) {
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onex[i].f = 0;
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(*f)();
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}
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exit(s && *s ? 1 : 0);
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}
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