X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=para.h;h=4de4af4a23dd0f0a6e225279f9e72423a027adc4;hp=3b9559e1beb93062c7cd7cb1cd0daace402b85ae;hb=2d0f83c1a63036fe5d57e0ee24c334674c987e23;hpb=f0e41e36c3f1a3a5bb6ff66d92d2814391d8f908

diff --git a/para.h b/para.h
index 3b9559e1..4de4af4a 100644
--- a/para.h
+++ b/para.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 1997-2012 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 1997-2013 Andre Noll <maan@systemlinux.org>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
@@ -71,6 +71,11 @@ extern __printf_2_3 void (*para_log)(int, const char*, ...);
 		vfprintf(stderr, fmt, argp); \
 		va_end(argp); \
 	}
+/**
+ * Define the standard log function and activate it.
+ *
+ * \param loglevel_barrier See \ref DEFINE_STDERR_LOGGER.
+ */
 #define INIT_STDERR_LOGGING(loglevel_barrier) \
 	DEFINE_STDERR_LOGGER(stderr_log, loglevel_barrier); \
 	__printf_2_3 void (*para_log)(int, const char*, ...) = stderr_log;
@@ -90,20 +95,24 @@ extern __printf_2_3 void (*para_log)(int, const char*, ...);
 int para_exec_cmdline_pid(pid_t *pid, const char *cmdline, int *fds);
 
 /* time */
-int tv_diff(const struct timeval *b, const struct timeval *a, struct timeval *diff);
-long unsigned tv2ms(const struct timeval*);
-void d2tv(double, struct timeval*);
-void tv_add(const struct timeval*, const struct timeval *, struct timeval *);
-void tv_scale(const unsigned long, const struct timeval *, struct timeval *);
+int tv_diff(const struct timeval *b, const struct timeval *a,
+		struct timeval *diff);
+long unsigned tv2ms(const struct timeval *tv);
+void d2tv(double x, struct timeval *tv);
+void tv_add(const struct timeval *a, const struct timeval *b,
+		struct timeval *sum);
+void tv_scale(const unsigned long mult, const struct timeval *tv,
+		struct timeval *result);
 void tv_divide(const unsigned long divisor, const struct timeval *tv,
-	struct timeval *result);
+		struct timeval *result);
 int tv_convex_combination(const long a, const struct timeval *tv1,
 		const long b, const struct timeval *tv2,
 		struct timeval *result);
-void ms2tv(const long unsigned n, struct timeval *tv);
+void ms2tv(long unsigned n, struct timeval *tv);
 void compute_chunk_time(long unsigned chunk_num,
 		struct timeval *chunk_tv, struct timeval *stream_start,
 		struct timeval *result);
+struct timeval *clock_get_realtime(struct timeval *tv);
 
 /** The enum of all status items. */
 enum status_items {STATUS_ITEM_ENUM NUM_STAT_ITEMS};
@@ -126,6 +135,18 @@ _static_inline_ long int para_random(unsigned max)
 	return ((max + 0.0) * (random() / (RAND_MAX + 1.0)));
 }
 
+/**
+ * Simple sanity check for I/O vectors.
+ *
+ * \param iov Pointer to the I/O vector to check.
+ *
+ * \return True if \a iov points to a non-empty buffer.
+ */
+_static_inline_ bool iov_valid(const struct iovec *iov)
+{
+	return iov && iov->iov_len > 0 && iov->iov_base;
+}
+
 /** Round up x to next multiple of y. */
 #define ROUND_UP(x, y) ({ \
 	const typeof(y) _divisor = y; \