Use placement new to optimize wifi scan

Archcady · Archcady · commit f24a40906aaa · 2017-08-07T11:23:30.000+08:00
diff --git a/targets/TARGET_Realtek/TARGET_AMEBA/RTWInterface.cpp b/targets/TARGET_Realtek/TARGET_AMEBA/RTWInterface.cpp
@@ -73,9 +73,7 @@ static rtw_result_t scan_result_handler( rtw_scan_handler_result_t* malloced_sca
             }
             ap.rssi = record->signal_strength;
             ap.channel = record->channel;
-            WiFiAccessPoint *accesspoint = new WiFiAccessPoint(ap);
-            memcpy(&scan_handler->ap_details[scan_handler->ap_num], accesspoint, sizeof(WiFiAccessPoint));
-            delete[] accesspoint;
+            new (&scan_handler->ap_details[scan_handler->ap_num]) WiFiAccessPoint(ap);
         }
         scan_handler->ap_num++;
     } else{

Original file line number	Diff line number	Diff line change
`@@ -73,9 +73,7 @@ static rtw_result_t scan_result_handler( rtw_scan_handler_result_t* malloced_sca`
`73`	`73`	`}`
`74`	`74`	`ap.rssi = record->signal_strength;`
`75`	`75`	`ap.channel = record->channel;`
`76`		`- WiFiAccessPoint *accesspoint = new WiFiAccessPoint(ap);`
`77`		`- memcpy(&scan_handler->ap_details[scan_handler->ap_num], accesspoint, sizeof(WiFiAccessPoint));`
`78`		`- delete[] accesspoint;`
	`76`	`+ new (&scan_handler->ap_details[scan_handler->ap_num]) WiFiAccessPoint(ap);`
`79`	`77`	`}`
`80`	`78`	`scan_handler->ap_num++;`
`81`	`79`	`} else{`