diff options
Diffstat (limited to 'sys/src/cmd/unix/drawterm/libc/nsec.c')
| -rw-r--r-- | sys/src/cmd/unix/drawterm/libc/nsec.c | 65 |
1 files changed, 0 insertions, 65 deletions
diff --git a/sys/src/cmd/unix/drawterm/libc/nsec.c b/sys/src/cmd/unix/drawterm/libc/nsec.c deleted file mode 100644 index 0f78cefff..000000000 --- a/sys/src/cmd/unix/drawterm/libc/nsec.c +++ /dev/null @@ -1,65 +0,0 @@ -#include <u.h> -#include <libc.h> - -static uvlong order = (uvlong) 0x0001020304050607ULL; - -static void -be2vlong(vlong *to, uchar *f) -{ - uchar *t, *o; - int i; - - t = (uchar*)to; - o = (uchar*)ℴ - for(i = 0; i < 8; i++) - t[o[i]] = f[i]; -} - -/* - * After a fork with fd's copied, both fd's are pointing to - * the same Chan structure. Since the offset is kept in the Chan - * structure, the seek's and read's in the two processes can - * compete at moving the offset around. Hence the retry loop. - * - * Since the bintime version doesn't need a seek, it doesn't - * have the loop. - */ -vlong -nsec(void) -{ - char b[12+1]; - static int f = -1; - static int usebintime; - int retries; - vlong t; - - if(f < 0){ - usebintime = 1; - f = open("/dev/bintime", OREAD|OCEXEC); - if(f < 0){ - usebintime = 0; - f = open("/dev/nsec", OREAD|OCEXEC); - if(f < 0) - return 0; - } - } - - if(usebintime){ - if(read(f, b, sizeof(uvlong)) < 0) - goto error; - be2vlong(&t, (uchar*)b); - return t; - } else { - for(retries = 0; retries < 100; retries++){ - if(seek(f, 0, 0) >= 0 && read(f, b, sizeof(b)-1) >= 0){ - b[sizeof(b)-1] = 0; - return strtoll(b, 0, 0); - } - } - } - -error: - close(f); - f = -1; - return 0; -} |