Rev 4872 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
4349 | Serge | 1 | /* Reentrant version of gettimeofday system call |
2 | This implementation just calls the times/gettimeofday system calls. |
||
3 | Gettimeofday may not be available on all targets. It's presence |
||
4 | here is dubious. Consider it for internal use only. */ |
||
5 | |||
6 | #include |
||
7 | #include |
||
8 | #include |
||
9 | #include |
||
10 | #include <_syslist.h> |
||
11 | #include |
||
12 | |||
13 | /* Some targets provides their own versions of these functions. Those |
||
14 | targets should define REENTRANT_SYSCALLS_PROVIDED in TARGET_CFLAGS. */ |
||
15 | |||
16 | #ifdef _REENT_ONLY |
||
17 | #ifndef REENTRANT_SYSCALLS_PROVIDED |
||
18 | #define REENTRANT_SYSCALLS_PROVIDED |
||
19 | #endif |
||
20 | #endif |
||
21 | |||
22 | #ifdef REENTRANT_SYSCALLS_PROVIDED |
||
23 | |||
24 | int _dummy_gettimeofday_syscalls = 1; |
||
25 | |||
26 | #else |
||
27 | |||
28 | /* We use the errno variable used by the system dependent layer. */ |
||
29 | #undef errno |
||
30 | static int errno; |
||
31 | |||
32 | /* |
||
33 | FUNCTION |
||
34 | <<_gettimeofday_r>>---Reentrant version of gettimeofday |
||
35 | |||
36 | INDEX |
||
37 | _gettimeofday_r |
||
38 | |||
39 | ANSI_SYNOPSIS |
||
40 | #include |
||
41 | #include |
||
42 | int _gettimeofday_r(struct _reent *<[ptr]>, |
||
43 | struct timeval *<[ptimeval]>, |
||
44 | void *<[ptimezone]>); |
||
45 | |||
46 | TRAD_SYNOPSIS |
||
47 | #include |
||
48 | #include |
||
49 | int _gettimeofday_r(<[ptr]>, <[ptimeval]>, <[ptimezone]>) |
||
50 | struct _reent *<[ptr]>; |
||
51 | struct timeval *<[ptimeval]>; |
||
52 | void *<[ptimezone]>; |
||
53 | |||
54 | DESCRIPTION |
||
55 | This is a reentrant version of < |
||
56 | takes a pointer to the global data block, which holds |
||
57 | < |
||
58 | |||
59 | This function is only available for a few targets. |
||
60 | Check libc.a to see if its available on yours. |
||
61 | */ |
||
62 | |||
63 | int |
||
64 | _DEFUN (_gettimeofday_r, (ptr, ptimeval, ptimezone), |
||
65 | struct _reent *ptr _AND |
||
66 | struct timeval *ptimeval _AND |
||
67 | void *ptimezone) |
||
68 | { |
||
69 | int ret; |
||
70 | |||
71 | errno = 0; |
||
72 | if ((ret = _gettimeofday (ptimeval, ptimezone)) == -1 && errno != 0) |
||
73 | ptr->_errno = errno; |
||
74 | return ret; |
||
75 | } |
||
76 | |||
77 | #define BCD_TO_BIN(val) ((val)=((val)&15) + ((val)>>4)*10) |
||
78 | |||
79 | int |
||
80 | _gettimeofday (struct timeval *tv, void *tz) |
||
81 | { |
||
82 | unsigned int xtmp; |
||
83 | struct tm tmblk; |
||
84 | |||
85 | if( tv ) |
||
86 | { |
||
87 | tv->tv_usec = 0; |
||
88 | |||
89 | __asm__ __volatile__("int $0x40":"=a"(xtmp):"0"(3)); |
||
90 | tmblk.tm_sec = (xtmp>>16)&0xff; |
||
91 | tmblk.tm_min = (xtmp>>8)&0xff; |
||
92 | tmblk.tm_hour = xtmp&0xff; |
||
93 | BCD_TO_BIN(tmblk.tm_sec); |
||
94 | BCD_TO_BIN(tmblk.tm_min); |
||
95 | BCD_TO_BIN(tmblk.tm_hour); |
||
96 | __asm__ __volatile__("int $0x40":"=a"(xtmp):"0"(29)); |
||
97 | tmblk.tm_mday = (xtmp>>16)&0xff; |
||
98 | tmblk.tm_mon = ((xtmp>>8)&0xff)-1; |
||
99 | tmblk.tm_year = ((xtmp&0xff)+2000)-1900; |
||
100 | tmblk.tm_wday = tmblk.tm_yday = 0; |
||
101 | tmblk.tm_isdst = -1; |
||
102 | tv->tv_sec = mktime(&tmblk); |
||
103 | return 0; |
||
104 | } |
||
105 | else |
||
106 | { |
||
107 | errno = EINVAL; |
||
108 | return -1; |
||
109 | }; |
||
110 | } |
||
111 | |||
112 | |||
113 | #endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */ |