time: Add cairo_time_t type

Add the cairo_time_t type (currently based on cairo_uint64_t) and use
it in cairo-observer and in the perf suite.

Fixes the build on MacOS X (for the src/ subdir) and Win32, whch
failed because they don't provide clock_gettime:

cairo-surface-observer.c:629: error: implicit declaration of function 'clock_gettime'
cairo-surface-observer.c:629: warning: nested extern declaration of 'clock_gettime'
cairo-surface-observer.c:629: error: 'CLOCK_MONOTONIC' undeclared (first use in this function)
...

1 files changed, 12 insertions, 0 deletions

diff --git a/src/cairo-wideint-private.h b/src/cairo-wideint-private.h
index b9f8dae64..53d2546e4 100644
--- a/src/cairo-wideint-private.h
+++ b/src/cairo-wideint-private.h
@@ -54,6 +54,8 @@
 cairo_uquorem64_t I
 _cairo_uint64_divrem (cairo_uint64_t num, cairo_uint64_t den);
 
+cairo_uint64_t I	_cairo_double_to_uint64 (double i);
+double	       I	_cairo_uint64_to_double (uint64_t i);
 cairo_uint64_t I	_cairo_uint32_to_uint64 (uint32_t i);
 #define			_cairo_uint64_to_uint32(a)  ((a).lo)
 cairo_uint64_t I	_cairo_uint64_add (cairo_uint64_t a, cairo_uint64_t b);
@@ -103,6 +105,16 @@ _cairo_uint64_divrem (cairo_uint64_t num, cairo_uint64_t den)
     return qr;
 }
 
+/*
+ * These need to be functions or gcc will complain when used on the
+ * result of a function:
+ *
+ * warning: cast from function call of type ‘#cairo_uint64_t’ to
+ * non-matching type ‘double’
+ */
+static cairo_always_inline cairo_uint64_t I _cairo_double_to_uint64 (double i) { return i; }
+static cairo_always_inline double I _cairo_uint64_to_double (cairo_uint64_t i) { return i; }
+
 #define			_cairo_uint32_to_uint64(i)  ((uint64_t) (i))
 #define			_cairo_uint64_to_uint32(i)  ((uint32_t) (i))
 #define			_cairo_uint64_add(a,b)	    ((a) + (b))