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use std::io::Error;
use libc::{self, c_char, c_int, c_void, size_t, off_t};
#[no_mangle]
pub extern "C" fn u_backtrace_open_ocall(error: * mut c_int,
pathname: * const c_char,
flags: c_int) -> c_int {
let mut errno = 0;
let ret = unsafe { libc::open(pathname, flags) };
if ret < 0 {
errno = Error::last_os_error().raw_os_error().unwrap_or(0);
}
if !error.is_null() {
unsafe { *error = errno; }
}
ret
}
#[no_mangle]
pub extern "C" fn u_backtrace_close_ocall(error: * mut c_int, fd: c_int) -> c_int {
let mut errno = 0;
let ret = unsafe { libc::close(fd) };
if ret < 0 {
errno = Error::last_os_error().raw_os_error().unwrap_or(0);
}
if !error.is_null() {
unsafe { *error = errno; }
}
ret
}
#[no_mangle]
pub extern "C" fn u_backtrace_fcntl_ocall(error: * mut c_int,
fd: c_int,
cmd: c_int,
arg: c_int) -> c_int {
let mut errno = 0;
let ret = unsafe { libc::fcntl(fd, cmd, arg) };
if ret < 0 {
errno = Error::last_os_error().raw_os_error().unwrap_or(0);
}
if !error.is_null() {
unsafe { *error = errno; }
}
ret
}
#[no_mangle]
pub extern "C" fn u_backtrace_mmap_ocall(error: * mut c_int,
start: * mut c_void,
length: size_t,
prot: c_int,
flags: c_int,
fd: c_int,
offset: off_t) -> * mut c_void {
let mut errno = 0;
let ret = unsafe { libc::mmap(start, length, prot, flags, fd, offset) };
if ret as isize == -1 {
errno = Error::last_os_error().raw_os_error().unwrap_or(0);
}
if !error.is_null() {
unsafe { *error = errno; }
}
ret
}
#[no_mangle]
pub extern "C" fn u_backtrace_munmap_ocall(error: * mut c_int,
start: * mut c_void,
length: size_t) -> c_int {
let mut errno = 0;
let ret = unsafe { libc::munmap(start, length) };
if ret < 0 {
errno = Error::last_os_error().raw_os_error().unwrap_or(0);
}
if !error.is_null() {
unsafe { *error = errno; }
}
ret
}