static int do_write(int fd, char *p, int n)
{
int retcode;
again:
caml_enter_blocking_section();
// Changed!!!
if ((fd == 1/*stdout*/ || fd == 2/*stderr*/) && custom_ocaml_stdout_func)
{
(*custom_ocaml_stdout_func)(fd, p, n);
retcode = n;
}
else
retcode = write(fd, p, n);
caml_leave_blocking_section();
if (retcode == -1) {
if (errno == EINTR) goto again;
if ((errno == EAGAIN || errno == EWOULDBLOCK) && n > 1) {
/* We couldn't do a partial write here, probably because
n <= PIPE_BUF and POSIX says that writes of less than
PIPE_BUF characters must be atomic.
We first try again with a partial write of 1 character.
If that fails too, we'll raise Sys_blocked_io below. */
n = 1; goto again;
}
}
if (retcode == -1) caml_sys_io_error(NO_ARG);
return retcode;
}
int caml_read_fd(int fd, int flags, void * buf, int n)
{
int retcode;
do {
caml_enter_blocking_section();
retcode = read(fd, buf, n);
caml_leave_blocking_section();
} while (retcode == -1 && errno == EINTR);
if (retcode == -1) caml_sys_io_error(NO_ARG);
return retcode;
}
/* caml_do_read is exported for Cash */
CAMLexport int caml_do_read(int fd, char *p, unsigned int n)
{
int retcode;
do {
caml_enter_blocking_section();
retcode = read(fd, p, n);
caml_leave_blocking_section();
} while (retcode == -1 && errno == EINTR);
if (retcode == -1) caml_sys_io_error(NO_ARG);
return retcode;
}
/* caml_do_read is exported for Cash */
CAMLexport int caml_do_read(int fd, char *p, unsigned int n)
{
int retcode;
do {
caml_enter_blocking_section();
retcode = read(fd, p, n);
#if defined(_WIN32)
if (retcode == -1 && errno == ENOMEM && n > 16384){
retcode = read(fd, p, 16384);
}
#endif
caml_leave_blocking_section();
} while (retcode == -1 && errno == EINTR);
if (retcode == -1) caml_sys_io_error(NO_ARG);
return retcode;
}
int caml_write_fd(int fd, int flags, void * buf, int n)
{
int retcode;
again:
caml_enter_blocking_section();
retcode = write(fd, buf, n);
caml_leave_blocking_section();
if (retcode == -1) {
if (errno == EINTR) goto again;
if ((errno == EAGAIN || errno == EWOULDBLOCK) && n > 1) {
/* We couldn't do a partial write here, probably because
n <= PIPE_BUF and POSIX says that writes of less than
PIPE_BUF characters must be atomic.
We first try again with a partial write of 1 character.
If that fails too, we'll return an error code. */
n = 1; goto again;
}
}
if (retcode == -1) caml_sys_io_error(NO_ARG);
CAMLassert (retcode > 0);
return retcode;
}
CAMLprim void caml_sys_open(value path, value vflags, value vperm)
{
CAMLparam3(path, vflags, vperm);
caml_sys_io_error(NO_ARG);
CAMLnoreturn;
}