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/*
Module: sys
Misc low level stuff
*/
enum type_desc = {
first_param: **ctypes::c_int,
size: ctypes::size_t,
align: ctypes::size_t
// Remaining fields not listed
};
#[abi = "cdecl"]
native mod rustrt {
// Explicitly re-export native stuff we want to be made
// available outside this crate. Otherwise it's
// visible-in-crate, but not re-exported.
fn last_os_error() -> str;
fn refcount<T>(t: @T) -> ctypes::intptr_t;
fn do_gc();
fn unsupervise();
fn shape_log_str<T>(t: *sys::type_desc, data: T) -> str;
fn rust_set_exit_status(code: ctypes::intptr_t);
fn set_min_stack(size: ctypes::uintptr_t);
}
#[abi = "rust-intrinsic"]
native mod rusti {
fn get_type_desc<T>() -> *type_desc;
}
/*
Function: get_type_desc
Returns a pointer to a type descriptor. Useful for calling certain
function in the Rust runtime or otherwise performing dark magick.
*/
fn get_type_desc<T>() -> *type_desc {
ret rusti::get_type_desc::<T>();
}
/*
Function: last_os_error
Get a string representing the platform-dependent last error
*/
fn last_os_error() -> str {
rustrt::last_os_error()
}
/*
Function: size_of
Returns the size of a type
*/
fn size_of<T>() -> uint unsafe {
ret (*get_type_desc::<T>()).size;
}
/*
Function: align_of
Returns the alignment of a type
*/
fn align_of<T>() -> uint unsafe {
ret (*get_type_desc::<T>()).align;
}
/*
Function: refcount
Returns the refcount of a shared box
*/
fn refcount<T>(t: @T) -> uint {
ret rustrt::refcount::<T>(t);
}
/*
Function: do_gc
Force a garbage collection
*/
fn do_gc() -> () {
ret rustrt::do_gc();
}
// FIXME: There's a wrapper for this in the task module and this really
// just belongs there
fn unsupervise() -> () {
ret rustrt::unsupervise();
}
fn log_str<T>(t: T) -> str {
rustrt::shape_log_str(get_type_desc::<T>(), t)
}
#[doc(
brief = "Sets the process exit code",
desc = "Sets the exit code returned by the process if all supervised \
tasks terminate successfully (without failing). If the current \
root task fails and is supervised by the scheduler then any \
user-specified exit status is ignored and the process exits \
with the default failure status."
)]
fn set_exit_status(code: int) {
rustrt::rust_set_exit_status(code as ctypes::intptr_t);
}
// FIXME: #1495 - This shouldn't exist
#[doc(
brief =
"Globally set the minimum size, in bytes, of a stack segment",
desc =
"Rust tasks have segmented stacks that are connected in a linked list \
allowing them to start very small and grow very large. In some \
situations this can result in poor performance. Calling this function \
will set the minimum size of all stack segments allocated in the \
future, for all tasks."
)]
#[deprecated]
fn set_min_stack(size: uint) {
rustrt::set_min_stack(size);
}
#[cfg(test)]
mod tests {
#[test]
fn last_os_error() {
log(debug, last_os_error());
}
#[test]
fn size_of_basic() {
assert size_of::<u8>() == 1u;
assert size_of::<u16>() == 2u;
assert size_of::<u32>() == 4u;
assert size_of::<u64>() == 8u;
}
#[test]
#[cfg(target_arch = "x86")]
#[cfg(target_arch = "arm")]
fn size_of_32() {
assert size_of::<uint>() == 4u;
assert size_of::<*uint>() == 4u;
}
#[test]
#[cfg(target_arch = "x86_64")]
fn size_of_64() {
assert size_of::<uint>() == 8u;
assert size_of::<*uint>() == 8u;
}
#[test]
fn align_of_basic() {
assert align_of::<u8>() == 1u;
assert align_of::<u16>() == 2u;
assert align_of::<u32>() == 4u;
}
#[test]
#[cfg(target_arch = "x86")]
#[cfg(target_arch = "arm")]
fn align_of_32() {
assert align_of::<uint>() == 4u;
assert align_of::<*uint>() == 4u;
}
#[test]
#[cfg(target_arch = "x86_64")]
fn align_of_64() {
assert align_of::<uint>() == 8u;
assert align_of::<*uint>() == 8u;
}
}
// Local Variables:
// mode: rust;
// fill-column: 78;
// indent-tabs-mode: nil
// c-basic-offset: 4
// buffer-file-coding-system: utf-8-unix
// End:
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