libuv: add more APIs

src/libuv/Cond.zig

@@ -6,6 +6,7 @@ const Allocator = std.mem.Allocator;
 const testing = std.testing;
 const c = @import("c.zig");
 const errors = @import("error.zig");
+const Mutex = @import("Mutex.zig");
 
 cond: *c.uv_cond_t,
 
@@ -29,8 +30,12 @@ pub fn broadcast(self: Cond) void {
     c.uv_cond_broadcast(self.cond);
 }
 
-pub fn wait(self: Cond) void {
-    c.uv_cond_wait(self.cond);
+pub fn wait(self: Cond, mutex: Mutex) void {
+    c.uv_cond_wait(self.cond, mutex.mutex);
+}
+
+pub fn timedwait(self: Cond, mutex: Mutex, timeout: u64) c_int {
+    return c.uv_cond_timedwait(self.cond, mutex.mutex, timeout);
 }
 
 test {

src/libuv/Loop.zig

@@ -79,6 +79,17 @@ pub fn now(self: Loop) u64 {
     return c.uv_now(self.loop);
 }
 
+/// Update the event loop’s concept of “now”. Libuv caches the current time at
+/// the start of the event loop tick in order to reduce the number of time-related
+/// system calls.
+///
+/// You won’t normally need to call this function unless you have callbacks
+/// that block the event loop for longer periods of time, where “longer” is
+/// somewhat subjective but probably on the order of a millisecond or more.
+pub fn updateTime(self: Loop) void {
+    return c.uv_update_time(self.loop);
+}
+
 /// Sets loop->data to data.
 pub fn setData(self: Loop, pointer: ?*anyopaque) void {
     c.uv_loop_set_data(self.loop, pointer);