From e5e74e55002349b44d27ea0f25e43bc5d7e7f74e Mon Sep 17 00:00:00 2001
From: Kyeyoon Park <kyeyoonp@qca.qualcomm.com>
Date: Wed, 6 Nov 2013 00:11:35 -0800
Subject: [PATCH] eloop: Add support for replenishing a registered timeout

eloop_replenish_timeout() finds a registered matching
<handler,eloop_data,user_data> timeout. If found, replenishes
the timeout if remaining time is less than the requested time.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
---
 src/utils/eloop.c     | 31 +++++++++++++++++++++++++++++++
 src/utils/eloop.h     | 16 ++++++++++++++++
 src/utils/eloop_win.c | 31 +++++++++++++++++++++++++++++++
 3 files changed, 78 insertions(+)

diff --git a/src/utils/eloop.c b/src/utils/eloop.c
index 12aa1251b..ddddcf17c 100644
--- a/src/utils/eloop.c
+++ b/src/utils/eloop.c
@@ -599,6 +599,37 @@ int eloop_is_timeout_registered(eloop_timeout_handler handler,
 }
 
 
+int eloop_replenish_timeout(unsigned int req_secs, unsigned int req_usecs,
+			    eloop_timeout_handler handler, void *eloop_data,
+			    void *user_data)
+{
+	struct os_time now, requested, remaining;
+	struct eloop_timeout *tmp;
+
+	dl_list_for_each(tmp, &eloop.timeout, struct eloop_timeout, list) {
+		if (tmp->handler == handler &&
+		    tmp->eloop_data == eloop_data &&
+		    tmp->user_data == user_data) {
+			requested.sec = req_secs;
+			requested.usec = req_usecs;
+			os_get_time(&now);
+			os_time_sub(&tmp->time, &now, &remaining);
+			if (os_time_before(&remaining, &requested)) {
+				eloop_cancel_timeout(handler, eloop_data,
+						     user_data);
+				eloop_register_timeout(requested.sec,
+						       requested.usec,
+						       handler, eloop_data,
+						       user_data);
+				return 1;
+			}
+		}
+	}
+
+	return 0;
+}
+
+
 #ifndef CONFIG_NATIVE_WINDOWS
 static void eloop_handle_alarm(int sig)
 {
diff --git a/src/utils/eloop.h b/src/utils/eloop.h
index 0037c6355..befb0703e 100644
--- a/src/utils/eloop.h
+++ b/src/utils/eloop.h
@@ -222,6 +222,22 @@ int eloop_cancel_timeout_one(eloop_timeout_handler handler,
 int eloop_is_timeout_registered(eloop_timeout_handler handler,
 				void *eloop_data, void *user_data);
 
+/**
+ * eloop_replenish_timeout - Replenish a timeout that is already registered
+ * @req_secs: Requested number of seconds to the timeout
+ * @req_usecs: Requested number of microseconds to the timeout
+ * @handler: Matching callback function
+ * @eloop_data: Matching eloop_data
+ * @user_data: Matching user_data
+ * Returns: 1 if the timeout is replenished, 0 if no change is made
+ *
+ * Find a registered matching <handler,eloop_data,user_data> timeout. If found,
+ * replenish the timeout if remaining time is less than the requested time.
+ */
+int eloop_replenish_timeout(unsigned int req_secs, unsigned int req_usecs,
+			    eloop_timeout_handler handler, void *eloop_data,
+			    void *user_data);
+
 /**
  * eloop_register_signal - Register handler for signals
  * @sig: Signal number (e.g., SIGHUP)
diff --git a/src/utils/eloop_win.c b/src/utils/eloop_win.c
index eda412f1b..1f40530cf 100644
--- a/src/utils/eloop_win.c
+++ b/src/utils/eloop_win.c
@@ -354,6 +354,37 @@ int eloop_is_timeout_registered(eloop_timeout_handler handler,
 }
 
 
+int eloop_replenish_timeout(unsigned int req_secs, unsigned int req_usecs,
+			    eloop_timeout_handler handler, void *eloop_data,
+			    void *user_data)
+{
+	struct os_time now, requested, remaining;
+	struct eloop_timeout *tmp;
+
+	dl_list_for_each(tmp, &eloop.timeout, struct eloop_timeout, list) {
+		if (tmp->handler == handler &&
+		    tmp->eloop_data == eloop_data &&
+		    tmp->user_data == user_data) {
+			requested.sec = req_secs;
+			requested.usec = req_usecs;
+			os_get_time(&now);
+			os_time_sub(&tmp->time, &now, &remaining);
+			if (os_time_before(&remaining, &requested)) {
+				eloop_cancel_timeout(handler, eloop_data,
+						     user_data);
+				eloop_register_timeout(requested.sec,
+						       requested.usec,
+						       handler, eloop_data,
+						       user_data);
+				return 1;
+			}
+		}
+	}
+
+	return 0;
+}
+
+
 /* TODO: replace with suitable signal handler */
 #if 0
 static void eloop_handle_signal(int sig)