mbed official
mbed library sources
Dependents: Encrypted my_mbed lklk CyaSSL_DTLS_Cellular ... more
Superseded
This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.
Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.
If you are looking for a stable and tested release, please import one of the official mbed library releases:
Import librarymbed
The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.
Last commit 20 Feb 2019 by 
mbed official
Diff: common/retarget.cpp
- Revision:
- 20:4263a77256ae
- Parent:
- 13:0645d8841f51
- Child:
- 23:8d50de55f208
--- a/common/retarget.cpp Mon Aug 19 18:17:02 2013 +0300
+++ b/common/retarget.cpp Tue Sep 10 15:14:19 2013 +0300
@@ -163,7 +163,9 @@
} else {
FilePath path(name);
- if (path.isFile()) {
+ if (!path.exists())
+ return -1;
+ else if (path.isFile()) {
res = path.file();
} else {
FileSystemLike *fs = path.fileSystem();
@@ -425,3 +427,30 @@
mbed_main();
}
#endif
+
+// Provide implementation of _sbrk (low-level dynamic memory allocation
+// routine) for GCC_ARM which compares new heap pointer with MSP instead of
+// SP. This make it compatible with RTX RTOS thread stacks.
+#if defined(TOOLCHAIN_GCC_ARM)
+// Linker defined symbol used by _sbrk to indicate where heap should start.
+extern "C" int __end__;
+
+// Turn off the errno macro and use actual global variable instead.
+#undef errno
+extern "C" int errno;
+
+// Dynamic memory allocation related syscall.
+extern "C" caddr_t _sbrk(int incr) {
+ static unsigned char* heap = (unsigned char*)&__end__;
+ unsigned char* prev_heap = heap;
+ unsigned char* new_heap = heap + incr;
+
+ if (new_heap >= (unsigned char*)__get_MSP()) {
+ errno = ENOMEM;
+ return (caddr_t)-1;
+ }
+
+ heap = new_heap;
+ return (caddr_t) prev_heap;
+}
+#endif
