Hendrik Lipka
program to test a possible memory leak when using NTP
Dependencies: NetServices mbed
Revision 0:3986c9f76b09, committed 2010-12-22
- Comitter:
- hlipka
- Date:
- Wed Dec 22 10:10:39 2010 +0000
- Child:
- 1:07158ff709d6
- Commit message:
- initial version
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/AvailableMemory.cpp Wed Dec 22 10:10:39 2010 +0000
@@ -0,0 +1,36 @@
+#include "AvailableMemory.h"
+#include <stdlib.h>
+#include <stdio.h>
+
+namespace segundo {
+namespace Utilities {
+
+int AvailableMemory(int resolution, int maximum, bool disableInterrupts) {
+
+ if (resolution < 1) resolution = 1;
+ if (maximum < 0) maximum = 0;
+
+ int low = 0;
+ int high = maximum + 1;
+
+ if (disableInterrupts) __disable_irq();
+
+ while (high - low > resolution) {
+ int mid = (low + high) / 2;
+ printf("try malloc %i bytes\n",mid);
+ void* p = malloc(mid);
+ if (p == NULL) {
+ high = mid;
+ } else {
+ free(p);
+ low = mid;
+ }
+ }
+
+ if (disableInterrupts) __enable_irq();
+
+ return low;
+}
+
+} // namespace Utilities
+} // namespace segundo
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/AvailableMemory.h Wed Dec 22 10:10:39 2010 +0000
@@ -0,0 +1,46 @@
+/** @file
+ * Return the memory available for a malloc call.
+ */
+#ifndef SEGUNDO_UTILITIES_AVAILABLEMEMORY_H
+#define SEGUNDO_UTILITIES_AVAILABLEMEMORY_H
+
+/**
+ * Segundo Equipo
+ */
+namespace segundo {
+/**
+ * A collection of utilities
+ */
+namespace Utilities {
+
+/** Return the memory available for a malloc call.
+ * This is done by a binary search approach
+ * calling malloc/free starting with a maximum.
+ *
+ * Example:
+ * @code
+ * #include <stdio.h>
+ * #include "AvailableMemory.h"
+ *
+ * int main() {
+ *
+ * printf("Available memory (bytes to nearest 256) : %d\n", AvailableMemory());
+ * printf("Available memory (exact bytes) : %d\n", AvailableMemory(1));
+ *
+ * }
+ * @endcode
+ * @param resolution Resolution in number of bytes,
+ * 1 will return the exact value,
+ * default will return the available memory to the nearest 256 bytes
+ * @param maximum Maximum amount of memory to check, default is 32K (0x8000)
+ * @param disableInterrupts Disable interrupts whilst checking, default is true
+ * @return Available memory in bytes accurate to within resolution
+ */
+int AvailableMemory(int resolution = 256, int maximum = 0x8000, bool disableInterrupts = true);
+
+} // namespace Utilities
+} // namespace segundo
+
+using namespace segundo::Utilities;
+
+#endif // SEGUNDO_UTILITIES_AVAILABLEMEMORY_H
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/NetServices.lib Wed Dec 22 10:10:39 2010 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/segundo/code/NetServices/#4e2468d7d5cb
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Wed Dec 22 10:10:39 2010 +0000
@@ -0,0 +1,63 @@
+#include "mbed.h"
+
+#include "EthernetNetIf.h"
+#include "NTPClient.h"
+
+#include "AvailableMemory.h"
+
+LocalFileSystem local("local");
+
+void updateTime()
+{
+ time_t ctTime;
+ time(&ctTime);
+ printf("Current time is (UTC): %s\n", ctime(&ctTime));
+
+ NTPClient ntp;
+ Host server(IpAddr(), 123, "0.de.pool.ntp.org");
+ ntp.setTime(server);
+
+ printf("set time ok\n");
+ time(&ctTime);
+ printf("Current time is (UTC): %s\n", ctime(&ctTime));
+
+}
+
+int main() {
+ printf("calculate free mem 1\n");
+ int i=AvailableMemory(1,0x8000,false);
+ printf("free mem=%i\n",i);
+
+// void* p1=malloc(8000);
+// void* p2=malloc(8000);
+
+ printf("calculate free mem 2\n");
+ i=AvailableMemory(1,0x8000,false);
+ printf("free mem=%i\n",i);
+
+ printf("setup\n");
+ EthernetNetIf eth;
+ EthernetErr ethErr;
+ printf("Setting up...\n");
+ do {
+ ethErr = eth.setup();
+ if (ethErr) printf("waiting for network...\n", ethErr);
+ } while (ethErr != ETH_OK);
+
+ printf("setup ok\n");
+
+ printf("calculate free mem 3\n");
+ i=AvailableMemory(1,0x8000,false);
+ printf("free mem=%i\n",i);
+ printf("calculate free mem 3\n");
+ i=AvailableMemory(1,0x8000,false);
+ printf("free mem=%i\n",i);
+
+ updateTime();
+
+// free(p1);
+// free(p2);
+ printf("calculate free mem 4\n");
+ i=AvailableMemory(1,0x100,false);
+ printf("free mem=%i\n",i);
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Wed Dec 22 10:10:39 2010 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/e2ac27c8e93e