124 lines
2.6 KiB
C
124 lines
2.6 KiB
C
/*
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* Copyright (c) 2011 The Chromium OS Authors.
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <fcntl.h>
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#include <stdlib.h>
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#include <termios.h>
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#include <unistd.h>
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#include <time.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#include <linux/types.h>
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#include <os.h>
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/* Operating System Interface */
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ssize_t os_read(int fd, void *buf, size_t count)
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{
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return read(fd, buf, count);
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}
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ssize_t os_write(int fd, const void *buf, size_t count)
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{
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return write(fd, buf, count);
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}
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int os_open(const char *pathname, int flags)
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{
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return open(pathname, flags);
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}
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int os_close(int fd)
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{
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return close(fd);
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}
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void os_exit(int exit_code)
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{
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exit(exit_code);
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}
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/* Restore tty state when we exit */
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static struct termios orig_term;
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static void os_fd_restore(void)
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{
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tcsetattr(0, TCSANOW, &orig_term);
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}
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/* Put tty into raw mode so <tab> and <ctrl+c> work */
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void os_tty_raw(int fd)
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{
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static int setup = 0;
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struct termios term;
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if (setup)
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return;
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setup = 1;
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/* If not a tty, don't complain */
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if (tcgetattr(fd, &orig_term))
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return;
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term = orig_term;
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term.c_iflag = IGNBRK | IGNPAR;
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term.c_oflag = OPOST | ONLCR;
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term.c_cflag = CS8 | CREAD | CLOCAL;
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term.c_lflag = 0;
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if (tcsetattr(fd, TCSANOW, &term))
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return;
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atexit(os_fd_restore);
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}
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void *os_malloc(size_t length)
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{
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return mmap(NULL, length, PROT_READ | PROT_WRITE,
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MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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}
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void os_usleep(unsigned long usec)
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{
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usleep(usec);
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}
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u64 os_get_nsec(void)
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{
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#if defined(CLOCK_MONOTONIC) && defined(_POSIX_MONOTONIC_CLOCK)
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struct timespec tp;
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if (EINVAL == clock_gettime(CLOCK_MONOTONIC, &tp)) {
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struct timeval tv;
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gettimeofday(&tv, NULL);
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tp.tv_sec = tv.tv_sec;
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tp.tv_nsec = tv.tv_usec * 1000;
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}
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return tp.tv_sec * 1000000000ULL + tp.tv_nsec;
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#else
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struct timeval tv;
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gettimeofday(&tv, NULL);
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return tv.tv_sec * 1000000000ULL + tv.tv_usec * 1000;
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#endif
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}
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