[PATCH net-next 01/10] selftests: net: Unify code of busywait() and slowwait()

[Petr Machata]

Bodies of busywait() and slowwait() functions are almost identical. Extract
the common code into a helper, loopy_wait, and convert busywait() and
slowwait() into trivial wrappers.

Moreover, the fact that slowwait() uses seconds for units is really not
intuitive, and the comment does not help much. Instead make the unit part
of the name of the argument to further clarify what units are expected.

Cc: Hangbin Liu <liuhang...@gmail.com>
Signed-off-by: Petr Machata <pe...@nvidia.com>
Reviewed-by: Benjamin Poirier <bpoir...@nvidia.com>
---
 tools/testing/selftests/net/forwarding/lib.sh | 22 ++-----------------
 tools/testing/selftests/net/lib.sh            | 16 +++++++++++---
 2 files changed, 15 insertions(+), 23 deletions(-)

diff --git a/tools/testing/selftests/net/forwarding/lib.sh 
b/tools/testing/selftests/net/forwarding/lib.sh
index 4103ed7afcde..658e4e7bf4b9 100644
--- a/tools/testing/selftests/net/forwarding/lib.sh
+++ b/tools/testing/selftests/net/forwarding/lib.sh
@@ -95,27 +95,9 @@ source "$net_forwarding_dir/../lib.sh"
 # timeout in seconds
 slowwait()
 {
-       local timeout=$1; shift
+       local timeout_sec=$1; shift
 
-       local start_time="$(date -u +%s)"
-       while true
-       do
-               local out
-               out=$("$@")
-               local ret=$?
-               if ((!ret)); then
-                       echo -n "$out"
-                       return 0
-               fi
-
-               local current_time="$(date -u +%s)"
-               if ((current_time - start_time > timeout)); then
-                       echo -n "$out"
-                       return 1
-               fi
-
-               sleep 0.1
-       done
+       loopy_wait "sleep 0.1" "$((timeout_sec * 1000))" "$@"
 }
 
 ##############################################################################
diff --git a/tools/testing/selftests/net/lib.sh 
b/tools/testing/selftests/net/lib.sh
index b7f7b8695165..c868c0aec121 100644
--- a/tools/testing/selftests/net/lib.sh
+++ b/tools/testing/selftests/net/lib.sh
@@ -58,9 +58,10 @@ ksft_exit_status_merge()
                $ksft_xfail $ksft_pass $ksft_skip $ksft_fail
 }
 
-busywait()
+loopy_wait()
 {
-       local timeout=$1; shift
+       local sleep_cmd=$1; shift
+       local timeout_ms=$1; shift
 
        local start_time="$(date -u +%s%3N)"
        while true
@@ -74,13 +75,22 @@ busywait()
                fi
 
                local current_time="$(date -u +%s%3N)"
-               if ((current_time - start_time > timeout)); then
+               if ((current_time - start_time > timeout_ms)); then
                        echo -n "$out"
                        return 1
                fi
+
+               $sleep_cmd
        done
 }
 
+busywait()
+{
+       local timeout_ms=$1; shift
+
+       loopy_wait : "$timeout_ms" "$@"
+}
+
 cleanup_ns()
 {
        local ns=""
-- 
2.43.0