C++ library function

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1711 42af7a65-404d-4744-a932-0658087f49c3

libxx/Makefile

+############################################################################
+# libxx/Makefile
+#
+#   Copyright (C) 2009 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in
+#    the documentation and/or other materials provided with the
+#    distribution.
+# 3. Neither the name NuttX nor the names of its contributors may be
+#    used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+###########################################################################
+
+-include $(TOPDIR)/Make.defs
+
+ASRCS		= 
+AOBJS		= $(ASRCS:.S=$(OBJEXT))
+CSRCS		= 
+COBJS		= $(CSRCS:.c=$(OBJEXT))
+CXXSRCS		= libxx_new.cxx libxx_delete.cxx
+CXXOBJS		= $(CXXSRCS:.cxx=$(OBJEXT))
+
+SRCS		= $(ASRCS) $(CSRCS) $(CXXSRCS)
+OBJS		= $(AOBJS) $(COBJS) $(CXXOBJS)
+
+BIN		= liblibxx$(LIBEXT)
+
+all:	$(BIN)
+
+$(AOBJS): %$(OBJEXT): %.S
+	$(call ASSEMBLE, $<, $@)
+
+$(COBJS): %$(OBJEXT): %.c
+	$(call COMPILE, $<, $@)
+
+$(CXXOBJS): %$(OBJEXT): %.cxx
+	$(call COMPILEXX, $<, $@)
+
+$(BIN):	$(OBJS)
+	@( for obj in $(OBJS) ; do \
+		$(call ARCHIVE, $@, $${obj}); \
+	done ; )
+
+.depend: Makefile $(SRCS)
+	@$(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
+	@touch $@
+
+depend: .depend
+
+clean:
+	@rm -f $(BIN) *~ .*.swp
+	$(call CLEAN)
+
+distclean: clean
+	@rm -f Make.dep .depend
+
+-include Make.dep

libxx/README.txt

+libxx/README.txt
+^^^^^^^^^^^^^^^^
+
+This directory contains a fragmentary C++ library that will allow
+to build only the simplest of C++ applications.  In the deeply
+embedded world, that is probably all that is necessary.  If you
+have a need for more extensive C++ support, the following libraries
+are recommended:
+
+ - libstdc++	(part of GCC)
+ - STLport	http://www.stlport.org/ 
+ - uClibc++	http://cxx.uclibc.org/
+
+At present, only the following are supported here:
+
+ - void *operator new(std::size_t nbytes);
+ - void operator delete(void* ptr);
\ No newline at end of file

libxx/libxx_delete.cxx

+//***************************************************************************
+// libxx/libxx_new.cxx
+//
+//   Copyright (C) 2009 Gregory Nutt. All rights reserved.
+//   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in
+//    the documentation and/or other materials provided with the
+//    distribution.
+// 3. Neither the name NuttX nor the names of its contributors may be
+//    used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+// OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+//***************************************************************************
+
+//***************************************************************************
+// Included Files
+//***************************************************************************
+
+#include <nuttx/config.h>
+#include <cstdlib>
+#include <debug.h>
+
+//***************************************************************************
+// Definitions
+//***************************************************************************
+
+//***************************************************************************
+// Private Data
+//***************************************************************************
+
+//***************************************************************************
+// Operators
+//***************************************************************************
+
+//***************************************************************************
+// Name: delete
+//***************************************************************************
+
+void operator delete(void* ptr)
+{
+  free(ptr);
+}

libxx/libxx_new.cxx

+//***************************************************************************
+// libxx/libxx_new.cxx
+//
+//   Copyright (C) 2009 Gregory Nutt. All rights reserved.
+//   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in
+//    the documentation and/or other materials provided with the
+//    distribution.
+// 3. Neither the name NuttX nor the names of its contributors may be
+//    used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+// OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+//***************************************************************************
+
+//***************************************************************************
+// Included Files
+//***************************************************************************
+
+#include <nuttx/config.h>
+#include <cstddef>
+#include <cstdlib>
+#include <debug.h>
+
+//***************************************************************************
+// Definitions
+//***************************************************************************
+
+//***************************************************************************
+// Private Data
+//***************************************************************************
+
+//***************************************************************************
+// Operators
+//***************************************************************************
+
+//***************************************************************************
+// Name: new
+//
+// NOTE:
+//   This should take a type of size_t, which for ARM GCC is unsigned long.
+//   but size_t may actually be a different different, in sys/include.h it
+//   is typed as uint32.  Need to REVISIT this.
+//***************************************************************************
+
+//void *operator new(size_t nbytes)
+void *operator new(unsigned long nbytes)
+{
+  // We have to allocate something
+
+  if (nbytes< 1)
+    {
+      nbytes = 1;
+    }
+
+  // Perform the allocation
+
+  void *alloc = malloc(nbytes);
+
+#ifdef CONFIG_DEBUG
+  if (alloc == 0)
+    {
+      // Oh my.. we are required to return a valid pointer and
+      // we cannot throw an exception!  We are bad.
+
+      dbg("Failed to allocate\n");
+    }
+#endif
+
+  // Return the allocated value
+
+  return alloc;
+}