2 * Copyright (c) 2011 The Chromium OS Authors.
3 * See file CREDITS for list of people who contributed to this
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; either version 2 of
9 * the License, or (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
31 #include <sys/types.h>
32 #include <linux/types.h>
36 /* Operating System Interface */
38 ssize_t os_read(int fd, void *buf, size_t count)
40 return read(fd, buf, count);
43 ssize_t os_write(int fd, const void *buf, size_t count)
45 return write(fd, buf, count);
48 int os_open(const char *pathname, int flags)
50 return open(pathname, flags);
58 void os_exit(int exit_code)
63 /* Restore tty state when we exit */
64 static struct termios orig_term;
66 static void os_fd_restore(void)
68 tcsetattr(0, TCSANOW, &orig_term);
71 /* Put tty into raw mode so <tab> and <ctrl+c> work */
72 void os_tty_raw(int fd)
81 /* If not a tty, don't complain */
82 if (tcgetattr(fd, &orig_term))
86 term.c_iflag = IGNBRK | IGNPAR;
87 term.c_oflag = OPOST | ONLCR;
88 term.c_cflag = CS8 | CREAD | CLOCAL;
90 if (tcsetattr(fd, TCSANOW, &term))
93 atexit(os_fd_restore);
96 void *os_malloc(size_t length)
98 return mmap(NULL, length, PROT_READ | PROT_WRITE,
99 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
102 void os_usleep(unsigned long usec)
107 u64 os_get_nsec(void)
109 #if defined(CLOCK_MONOTONIC) && defined(_POSIX_MONOTONIC_CLOCK)
111 if (EINVAL == clock_gettime(CLOCK_MONOTONIC, &tp)) {
114 gettimeofday(&tv, NULL);
115 tp.tv_sec = tv.tv_sec;
116 tp.tv_nsec = tv.tv_usec * 1000;
118 return tp.tv_sec * 1000000000ULL + tp.tv_nsec;
121 gettimeofday(&tv, NULL);
122 return tv.tv_sec * 1000000000ULL + tv.tv_usec * 1000;