mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer-rs.git
synced 2024-11-05 17:19:42 +00:00
Add macro to define newtype wrappers around MiniObjects
To allow implementing them in a meaningful way in external crates.
This commit is contained in:
Sebastian Dröge
parent
bc8da095c3
commit
74024447fe
1 changed files with 357 additions and 4 deletions
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@ -14,7 +14,7 @@ use std::{borrow, fmt, ops};
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use ffi;
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use glib;
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use glib::translate::{
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c_ptr_array_len, from_glib, from_glib_full, from_glib_none, FromGlibContainerAsVec,
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from_glib, from_glib_full, from_glib_none, FromGlibContainerAsVec,
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FromGlibPtrArrayContainerAsVec, FromGlibPtrBorrow, FromGlibPtrFull, FromGlibPtrNone,
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GlibPtrDefault, Stash, StashMut, ToGlibContainerFromSlice, ToGlibPtr, ToGlibPtrMut,
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};
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@ -397,15 +397,24 @@ impl<T: MiniObject + 'static> FromGlibPtrArrayContainerAsVec<*mut T::GstType, *m
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for GstRc<T>
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{
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unsafe fn from_glib_none_as_vec(ptr: *mut *mut T::GstType) -> Vec<Self> {
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FromGlibContainerAsVec::from_glib_none_num_as_vec(ptr, c_ptr_array_len(ptr))
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FromGlibContainerAsVec::from_glib_none_num_as_vec(
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ptr,
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glib::translate::c_ptr_array_len(ptr),
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)
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}
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unsafe fn from_glib_container_as_vec(ptr: *mut *mut T::GstType) -> Vec<Self> {
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FromGlibContainerAsVec::from_glib_container_num_as_vec(ptr, c_ptr_array_len(ptr))
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FromGlibContainerAsVec::from_glib_container_num_as_vec(
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ptr,
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glib::translate::c_ptr_array_len(ptr),
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)
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}
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unsafe fn from_glib_full_as_vec(ptr: *mut *mut T::GstType) -> Vec<Self> {
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FromGlibContainerAsVec::from_glib_full_num_as_vec(ptr, c_ptr_array_len(ptr))
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FromGlibContainerAsVec::from_glib_full_num_as_vec(
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ptr,
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glib::translate::c_ptr_array_len(ptr),
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)
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}
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}
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@ -479,3 +488,347 @@ impl<T: MiniObject + glib::StaticType> glib::value::SetValueOptional for GstRc<T
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impl<T: MiniObject + 'static> GlibPtrDefault for GstRc<T> {
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type GlibType = *mut T::GstType;
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}
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#[macro_export]
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macro_rules! gst_define_mini_object_wrapper(
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($name:ident, $ref_name:ident, $ffi_name:path, [$($derives:ident,)*], $get_type:expr) => {
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#[derive($($derives,)*)]
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pub struct $name($crate::GstRc<$ref_name>);
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#[repr(C)]
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pub struct $ref_name($ffi_name);
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impl $name {
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pub unsafe fn from_glib_none(ptr: *const $ffi_name) -> Self {
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$name(from_glib_none(ptr))
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}
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pub unsafe fn from_glib_full(ptr: *const $ffi_name) -> Self {
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$name(from_glib_full(ptr))
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}
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pub unsafe fn from_glib_borrow(ptr: *const $ffi_name) -> Self {
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$name(from_glib_borrow(ptr))
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}
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pub unsafe fn into_ptr(self) -> *mut $ffi_name {
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self.0.into_ptr()
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}
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}
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impl ::std::ops::Deref for $name {
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type Target = $crate::GstRc<$ref_name>;
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fn deref(&self) -> &Self::Target {
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&self.0
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}
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}
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impl ::std::ops::DerefMut for $name {
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fn deref_mut(&mut self) -> &mut Self::Target {
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&mut self.0
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}
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}
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impl AsRef<$ref_name> for $name {
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fn as_ref(&self) -> &$ref_name {
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self.0.as_ref()
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}
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}
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impl ::std::borrow::Borrow<$ref_name> for $name {
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fn borrow(&self) -> &$ref_name {
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self.as_ref()
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}
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}
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impl glib::types::StaticType for $name {
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fn static_type() -> glib::types::Type {
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$ref_name::static_type()
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}
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}
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impl<'a> glib::translate::ToGlibPtr<'a, *const $ffi_name> for $name {
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type Storage = glib::translate::Stash<'a, *const $ffi_name, $crate::GstRc<$ref_name>>;
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fn to_glib_none(&'a self) -> glib::translate::Stash<'a, *const $ffi_name, Self> {
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let stash = self.0.to_glib_none();
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glib::translate::Stash(stash.0, stash)
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}
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fn to_glib_full(&self) -> *const $ffi_name {
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self.0.to_glib_full()
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}
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}
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impl<'a> glib::translate::ToGlibPtr<'a, *mut $ffi_name> for $name {
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type Storage = glib::translate::Stash<'a, *mut $ffi_name, $crate::GstRc<$ref_name>>;
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fn to_glib_none(&'a self) -> glib::translate::Stash<'a, *mut $ffi_name, Self> {
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let stash = self.0.to_glib_none();
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glib::translate::Stash(stash.0, stash)
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}
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fn to_glib_full(&self) -> *mut $ffi_name {
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self.0.to_glib_full()
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}
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}
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impl<'a> glib::translate::ToGlibPtrMut<'a, *mut $ffi_name> for $name {
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type Storage = glib::translate::StashMut<'a, *mut $ffi_name, $crate::GstRc<$ref_name>>;
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fn to_glib_none_mut(&'a mut self) -> glib::translate::StashMut<*mut $ffi_name, Self> {
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let stash = self.0.to_glib_none_mut();
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glib::translate::StashMut(stash.0, stash)
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}
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}
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impl<'a> glib::translate::ToGlibContainerFromSlice<'a, *mut *mut $ffi_name> for $name {
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#[cfg_attr(feature = "cargo-clippy", allow(type_complexity))]
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type Storage = (
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Vec<glib::translate::Stash<'a, *mut $ffi_name, $name>>,
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Option<Vec<*mut $ffi_name>>,
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);
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fn to_glib_none_from_slice(t: &'a [$name]) -> (*mut *mut $ffi_name, Self::Storage) {
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skip_assert_initialized!();
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let v: Vec<_> = t.iter().map(|s| s.to_glib_none()).collect();
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let mut v_ptr: Vec<_> = v.iter().map(|s| s.0).collect();
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v_ptr.push(ptr::null_mut() as *mut $ffi_name);
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(v_ptr.as_ptr() as *mut *mut $ffi_name, (v, Some(v_ptr)))
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}
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fn to_glib_container_from_slice(t: &'a [$name]) -> (*mut *mut $ffi_name, Self::Storage) {
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skip_assert_initialized!();
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let v: Vec<_> = t.iter().map(|s| s.to_glib_none()).collect();
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let v_ptr = unsafe {
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let v_ptr = glib_ffi::g_malloc0(mem::size_of::<*mut $ffi_name>() * t.len() + 1)
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as *mut *mut $ffi_name;
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for (i, s) in v.iter().enumerate() {
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ptr::write(v_ptr.offset(i as isize), s.0);
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}
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v_ptr
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};
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(v_ptr, (v, None))
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}
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fn to_glib_full_from_slice(t: &[$name]) -> *mut *mut $ffi_name {
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skip_assert_initialized!();
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unsafe {
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let v_ptr = glib_ffi::g_malloc0(mem::size_of::<*mut $ffi_name>() * t.len() + 1)
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as *mut *mut $ffi_name;
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for (i, s) in t.iter().enumerate() {
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ptr::write(v_ptr.offset(i as isize), s.to_glib_full());
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}
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v_ptr
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}
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}
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}
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impl<'a> glib::translate::ToGlibContainerFromSlice<'a, *const *mut $ffi_name>
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for $name
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{
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#[cfg_attr(feature = "cargo-clippy", allow(type_complexity))]
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type Storage = (
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Vec<glib::translate::Stash<'a, *mut $ffi_name, $name>>,
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Option<Vec<*mut $ffi_name>>,
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);
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fn to_glib_none_from_slice(t: &'a [$name]) -> (*const *mut $ffi_name, Self::Storage) {
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skip_assert_initialized!();
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let (ptr, stash) =
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glib::translate::ToGlibContainerFromSlice::<'a, *mut *mut $ffi_name>::to_glib_none_from_slice(t);
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(ptr as *const *mut $ffi_name, stash)
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}
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fn to_glib_container_from_slice(_: &'a [$name]) -> (*const *mut $ffi_name, Self::Storage) {
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skip_assert_initialized!();
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// Can't have consumer free a *const pointer
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unimplemented!()
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}
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fn to_glib_full_from_slice(_: &[$name]) -> *const *mut $ffi_name {
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skip_assert_initialized!();
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// Can't have consumer free a *const pointer
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unimplemented!()
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}
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}
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impl glib::translate::FromGlibPtrNone<*const $ffi_name> for $name {
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unsafe fn from_glib_none(ptr: *const $ffi_name) -> Self {
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Self::from_glib_none(ptr)
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}
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}
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impl glib::translate::FromGlibPtrNone<*mut $ffi_name> for $name {
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unsafe fn from_glib_none(ptr: *mut $ffi_name) -> Self {
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Self::from_glib_none(ptr)
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}
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}
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impl glib::translate::FromGlibPtrFull<*const $ffi_name> for $name {
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unsafe fn from_glib_full(ptr: *const $ffi_name) -> Self {
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Self::from_glib_full(ptr)
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}
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}
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impl glib::translate::FromGlibPtrFull<*mut $ffi_name> for $name {
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unsafe fn from_glib_full(ptr: *mut $ffi_name) -> Self {
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Self::from_glib_full(ptr)
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}
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}
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impl glib::translate::FromGlibPtrBorrow<*const $ffi_name> for $name {
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unsafe fn from_glib_borrow(ptr: *const $ffi_name) -> Self {
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Self::from_glib_borrow(ptr)
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}
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}
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impl glib::translate::FromGlibPtrBorrow<*mut $ffi_name> for $name {
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unsafe fn from_glib_borrow(ptr: *mut $ffi_name) -> Self {
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Self::from_glib_borrow(ptr)
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}
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}
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impl glib::translate::FromGlibContainerAsVec<*mut $ffi_name, *mut *mut $ffi_name>
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for $name
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{
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unsafe fn from_glib_none_num_as_vec(ptr: *mut *mut $ffi_name, num: usize) -> Vec<Self> {
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if num == 0 || ptr.is_null() {
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return Vec::new();
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}
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let mut res = Vec::with_capacity(num);
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for i in 0..num {
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res.push(from_glib_none(ptr::read(ptr.offset(i as isize))));
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}
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res
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}
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unsafe fn from_glib_container_num_as_vec(ptr: *mut *mut $ffi_name, num: usize) -> Vec<Self> {
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let res = glib::translate::FromGlibContainerAsVec::from_glib_none_num_as_vec(ptr, num);
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glib_ffi::g_free(ptr as *mut _);
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res
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}
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unsafe fn from_glib_full_num_as_vec(ptr: *mut *mut $ffi_name, num: usize) -> Vec<Self> {
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if num == 0 || ptr.is_null() {
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return Vec::new();
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}
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let mut res = Vec::with_capacity(num);
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for i in 0..num {
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res.push(from_glib_full(ptr::read(ptr.offset(i as isize))));
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}
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glib_ffi::g_free(ptr as *mut _);
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res
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}
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}
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impl glib::translate::FromGlibPtrArrayContainerAsVec<*mut $ffi_name, *mut *mut $ffi_name>
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for $name
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{
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unsafe fn from_glib_none_as_vec(ptr: *mut *mut $ffi_name) -> Vec<Self> {
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glib::translate::FromGlibContainerAsVec::from_glib_none_num_as_vec(ptr, glib::translate::c_ptr_array_len(ptr))
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}
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unsafe fn from_glib_container_as_vec(ptr: *mut *mut $ffi_name) -> Vec<Self> {
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glib::translate::FromGlibContainerAsVec::from_glib_container_num_as_vec(ptr, glib::translate::c_ptr_array_len(ptr))
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}
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unsafe fn from_glib_full_as_vec(ptr: *mut *mut $ffi_name) -> Vec<Self> {
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glib::translate::FromGlibContainerAsVec::from_glib_full_num_as_vec(ptr, glib::translate::c_ptr_array_len(ptr))
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}
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}
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impl glib::translate::FromGlibContainerAsVec<*mut $ffi_name, *const *mut $ffi_name>
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for $name
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{
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unsafe fn from_glib_none_num_as_vec(ptr: *const *mut $ffi_name, num: usize) -> Vec<Self> {
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glib::translate::FromGlibContainerAsVec::from_glib_none_num_as_vec(ptr as *mut *mut _, num)
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}
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unsafe fn from_glib_container_num_as_vec(_: *const *mut $ffi_name, _: usize) -> Vec<Self> {
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// Can't free a *const
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unimplemented!()
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}
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unsafe fn from_glib_full_num_as_vec(_: *const *mut $ffi_name, _: usize) -> Vec<Self> {
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// Can't free a *const
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unimplemented!()
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}
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}
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impl glib::translate::FromGlibPtrArrayContainerAsVec<*mut $ffi_name, *const *mut $ffi_name> for $name
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{
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unsafe fn from_glib_none_as_vec(ptr: *const *mut $ffi_name) -> Vec<Self> {
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glib::translate::FromGlibPtrArrayContainerAsVec::from_glib_none_as_vec(ptr as *mut *mut _)
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}
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unsafe fn from_glib_container_as_vec(_: *const *mut $ffi_name) -> Vec<Self> {
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// Can't free a *const
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unimplemented!()
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}
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unsafe fn from_glib_full_as_vec(_: *const *mut $ffi_name) -> Vec<Self> {
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// Can't free a *const
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unimplemented!()
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}
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}
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impl<'a> glib::value::FromValueOptional<'a>
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for $name
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{
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unsafe fn from_value_optional(v: &'a glib::Value) -> Option<Self> {
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<gst::GstRc<$ref_name> as glib::value::FromValueOptional>::from_value_optional(v).map($name)
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}
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}
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impl glib::value::SetValue for $name {
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unsafe fn set_value(v: &mut glib::Value, s: &Self) {
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<gst::GstRc<$ref_name> as glib::value::SetValue>::set_value(v, &s.0)
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}
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}
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impl glib::value::SetValueOptional for $name {
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unsafe fn set_value_optional(v: &mut glib::Value, s: Option<&Self>) {
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<gst::GstRc<$ref_name> as glib::value::SetValueOptional>::set_value_optional(v, s.map(|s| &s.0))
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}
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}
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impl glib::translate::GlibPtrDefault for $name {
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type GlibType = *mut $ffi_name;
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}
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unsafe impl $crate::MiniObject for $ref_name {
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type GstType = $ffi_name;
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}
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impl glib::types::StaticType for $ref_name {
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fn static_type() -> glib::types::Type {
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unsafe { from_glib($get_type()) }
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}
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}
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impl ToOwned for $ref_name {
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type Owned = $name;
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fn to_owned(&self) -> $name {
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#[cfg_attr(feature = "cargo-clippy", allow(cast_ptr_alignment))]
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unsafe {
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$name(from_glib_none(self.as_ptr()))
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}
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}
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}
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unsafe impl Sync for $ref_name {}
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unsafe impl Send for $ref_name {}
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}
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);
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