win32: implement nanosleep and enable float sleep by default

Don't expect sleeping for fractions of a second to be very accurate.

4 files changed, 22 insertions, 2 deletions

diff --git a/configs/mingw32_defconfig b/configs/mingw32_defconfig
index a9fa2ee4b..2d0e24891 100644
--- a/configs/mingw32_defconfig
+++ b/configs/mingw32_defconfig
@@ -279,7 +279,7 @@ CONFIG_SEQ=y
 CONFIG_SHUF=y
 CONFIG_SLEEP=y
 CONFIG_FEATURE_FANCY_SLEEP=y
-# CONFIG_FEATURE_FLOAT_SLEEP is not set
+CONFIG_FEATURE_FLOAT_SLEEP=y
 CONFIG_SORT=y
 CONFIG_FEATURE_SORT_BIG=y
 CONFIG_SPLIT=y
diff --git a/configs/mingw64_defconfig b/configs/mingw64_defconfig
index 085158971..7ee4e58f9 100644
--- a/configs/mingw64_defconfig
+++ b/configs/mingw64_defconfig
@@ -279,7 +279,7 @@ CONFIG_SEQ=y
 CONFIG_SHUF=y
 CONFIG_SLEEP=y
 CONFIG_FEATURE_FANCY_SLEEP=y
-# CONFIG_FEATURE_FLOAT_SLEEP is not set
+CONFIG_FEATURE_FLOAT_SLEEP=y
 CONFIG_SORT=y
 CONFIG_FEATURE_SORT_BIG=y
 CONFIG_SPLIT=y
diff --git a/include/mingw.h b/include/mingw.h
index 04700963c..6d4d2b31c 100644
--- a/include/mingw.h
+++ b/include/mingw.h
@@ -341,6 +341,8 @@ struct timespec {
 };
 #endif
 
+int nanosleep(const struct timespec *req, struct timespec *rem);
+
 /*
  * sys/wait.h
  */
diff --git a/win32/mingw.c b/win32/mingw.c
index 23ca5d3dd..1170cd9d5 100644
--- a/win32/mingw.c
+++ b/win32/mingw.c
@@ -452,6 +452,24 @@ unsigned int sleep (unsigned int seconds)
         return 0;
 }
 
+int nanosleep(const struct timespec *req, struct timespec *rem)
+{
+        if (req->tv_nsec < 0 || 1000000000 <= req->tv_nsec) {
+                errno = EINVAL;
+                return -1;
+        }
+
+        Sleep(req->tv_sec*1000 + req->tv_nsec/1000000);
+
+        /* Sleep is not interruptible.  So there is no remaining delay.  */
+        if (rem != NULL) {
+                rem->tv_sec = 0;
+                rem->tv_nsec = 0;
+        }
+
+        return 0;
+}
+
 /*
  * Windows' mktemp returns NULL on error whereas POSIX always returns the
  * template and signals an error by making it an empty string.