From 5252c2920ce5487221f7ce1f902f040578317194 Mon Sep 17 00:00:00 2001
From: darylm503 <darylm503@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Sun, 11 Sep 2011 20:09:02 +0000
Subject: StdLib|LibC: Implement the sleep() function.

Implement the sleep() function and make both sleep() and usleep() public.  Required initially for Python, but these functions have general applicability.

Signed-off-by: duanev@gmail.com
Reviewed-by:   darylm503


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12323 6f19259b-4bc3-4df7-8a09-765794883524
---
 StdLib/Include/unistd.h   |  4 ++--
 StdLib/LibC/Uefi/select.c | 27 ++++++++++++++-------------
 2 files changed, 16 insertions(+), 15 deletions(-)

(limited to 'StdLib')

diff --git a/StdLib/Include/unistd.h b/StdLib/Include/unistd.h
index df78690525..2134f15765 100644
--- a/StdLib/Include/unistd.h
+++ b/StdLib/Include/unistd.h
@@ -37,6 +37,8 @@ extern   int    optind;
 pid_t           getpgrp(void);
 pid_t           tcgetpgrp(int);
 char           *getpass(const char *);
+int             usleep(useconds_t);
+unsigned int    sleep(unsigned int);
 
 // Networking
 long            gethostid(void);
@@ -84,7 +86,6 @@ int             setgid(gid_t);
 int             setpgid(pid_t, pid_t);
 pid_t           setsid(void);
 int             setuid(uid_t);
-unsigned int    sleep(unsigned int);
 long            sysconf(int);
 
 int             tcsetpgrp(int, pid_t);
@@ -127,7 +128,6 @@ void            swab(const void *, void *, size_t);
 int             symlink(const char *, const char *);
 void            sync(void);
 useconds_t      ualarm(useconds_t, useconds_t);
-int             usleep(useconds_t);
 pid_t           vfork(void) __RENAME(__vfork14);
 
 /*
diff --git a/StdLib/LibC/Uefi/select.c b/StdLib/LibC/Uefi/select.c
index 8da03e65d0..830e011e0d 100644
--- a/StdLib/LibC/Uefi/select.c
+++ b/StdLib/LibC/Uefi/select.c
@@ -74,19 +74,14 @@
 
 #define MAX_SLEEP_DELAY 0xfffffffe
 
-//
-//  Name:
-//      usleep
-//
-//  Description:
-//      Implement usleep(3) function.
-//
-//  Arguments:
-//      Microseconds to sleep.
-//
-//  Returns:
-//      0
-//
+/** Sleep for the specified number of Microseconds.
+
+    Implements the usleep(3) function.
+
+    @param[in]    Microseconds    Number of microseconds to sleep.
+
+    @retval   0   Always returns zero.
+**/
 int
 usleep( useconds_t Microseconds )
 {
@@ -98,6 +93,12 @@ usleep( useconds_t Microseconds )
   return (0);
 }
 
+unsigned int
+sleep( unsigned int Seconds )
+{
+  return (usleep( useconds_t(Seconds * 1000000) ));
+}
+
 static int
 selscan(
   fd_mask **ibits,
-- 
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