Use NonZeroU64/U32 for PadProbeId, NotifyId and DeviceMonitorFilterId

This allows for some further optimizations.

gstreamer/src/device_monitor.rs

@@ -15,6 +15,8 @@ use glib::translate::*;
 
 use gst_sys;
 
+use std::num::NonZeroU32;
+
 impl DeviceMonitor {
     pub fn new() -> DeviceMonitor {
         assert_initialized_main_thread!();
@@ -35,13 +37,13 @@ impl Default for DeviceMonitor {
 }
 
 #[derive(Debug, PartialEq, Eq)]
-pub struct DeviceMonitorFilterId(libc::c_uint);
+pub struct DeviceMonitorFilterId(NonZeroU32);
 
 impl ToGlib for DeviceMonitorFilterId {
     type GlibType = libc::c_uint;
 
     fn to_glib(&self) -> libc::c_uint {
-        self.0
+        self.0.get()
     }
 }
 
@@ -49,7 +51,7 @@ impl FromGlib<libc::c_uint> for DeviceMonitorFilterId {
     fn from_glib(val: libc::c_uint) -> DeviceMonitorFilterId {
         skip_assert_initialized!();
         assert_ne!(val, 0);
-        DeviceMonitorFilterId(val)
+        DeviceMonitorFilterId(unsafe { NonZeroU32::new_unchecked(val) })
     }
 }
 

gstreamer/src/element.rs

@@ -39,6 +39,7 @@ use StateChangeSuccess;
 
 use std::ffi::CStr;
 use std::mem;
+use std::num::NonZeroU64;
 
 use libc;
 
@@ -106,13 +107,13 @@ pub enum ElementMessageType {
 }
 
 #[derive(Debug, PartialEq, Eq)]
-pub struct NotifyWatchId(libc::c_ulong);
+pub struct NotifyWatchId(NonZeroU64);
 
 impl ToGlib for NotifyWatchId {
     type GlibType = libc::c_ulong;
 
     fn to_glib(&self) -> libc::c_ulong {
-        self.0
+        self.0.get() as libc::c_ulong
     }
 }
 
@@ -120,7 +121,7 @@ impl FromGlib<libc::c_ulong> for NotifyWatchId {
     fn from_glib(val: libc::c_ulong) -> NotifyWatchId {
         skip_assert_initialized!();
         assert_ne!(val, 0);
-        NotifyWatchId(val)
+        NotifyWatchId(unsafe { NonZeroU64::new_unchecked(val as u64) })
     }
 }
 
@@ -569,7 +570,7 @@ impl<O: IsA<Element>> ElementExtManual for O {
         unsafe {
             gst_sys::gst_element_remove_property_notify_watch(
                 self.as_ref().to_glib_none().0,
-                watch_id.0,
+                watch_id.to_glib(),
             );
         }
     }

gstreamer/src/pad.rs

@@ -32,6 +32,7 @@ use StaticPadTemplate;
 
 use std::cell::RefCell;
 use std::mem;
+use std::num::NonZeroU64;
 use std::ptr;
 
 use glib;
@@ -61,13 +62,13 @@ impl Pad {
 }
 
 #[derive(Debug, PartialEq, Eq)]
-pub struct PadProbeId(libc::c_ulong);
+pub struct PadProbeId(NonZeroU64);
 
 impl ToGlib for PadProbeId {
     type GlibType = libc::c_ulong;
 
     fn to_glib(&self) -> libc::c_ulong {
-        self.0
+        self.0.get() as libc::c_ulong
     }
 }
 
@@ -75,7 +76,7 @@ impl FromGlib<libc::c_ulong> for PadProbeId {
     fn from_glib(val: libc::c_ulong) -> PadProbeId {
         skip_assert_initialized!();
         assert_ne!(val, 0);
-        PadProbeId(val)
+        PadProbeId(unsafe { NonZeroU64::new_unchecked(val as u64) })
     }
 }
 
@@ -1032,7 +1033,7 @@ where
 
     let mut probe_info = PadProbeInfo {
         mask: from_glib((*info).type_),
-        id: PadProbeId((*info).id),
+        id: PadProbeId(NonZeroU64::new_unchecked((*info).id)),
         offset: (*info).offset,
         size: (*info).size,
         data: if (*info).data.is_null() {