simple C++ example

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1705 42af7a65-404d-4744-a932-0658087f49c3

examples/helloxx/Makefile

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+############################################################################
+# examples/hello/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)/.config
+-include $(TOPDIR)/Make.defs
+
+ASRCS	= 
+AOBJS	= $(ASRCS:.S=$(OBJEXT))
+CSRCS	= 
+COBJS	= $(CSRCS:.c=$(OBJEXT))
+CXXSRCS	= main.cxx
+CXXOBJS	= $(CXXSRCS:.cxx=$(OBJEXT))
+
+SRCS	= $(ASRCS) $(CSRCS) $(CXXSRCS)
+OBJS	= $(AOBJS) $(COBJS) $(CXXOBJS)
+
+BIN	= lib$(CONFIG_EXAMPLE)$(LIBEXT)
+
+all:	$(BIN)
+.PHONY:	clean depend chkcxx
+
+chkcxx:
+ifndef CXX
+	@echo "In order to use this example, you toolchain must support C++"
+	@echo "and CXX, CXXFLAGS, and COMPILEXX must be defined in the Make.defs"
+	@echo "file of the configuration that you are using."
+	@exit 1
+endif
+
+$(AOBJS): %$(OBJEXT): %.S
+	$(call ASSEMBLE, $<, $@)
+
+$(COBJS): %$(OBJEXT): %.c
+	$(call COMPILE, $<, $@)
+
+$(CXXOBJS): %$(OBJEXT): %.cxx
+	$(call COMPILEXX, $<, $@)
+
+$(BIN):	chkcxx $(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

examples/helloxx/main.cxx

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+//***************************************************************************
+// examples/hello/main.c
+//
+//   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 <nuttx/init.h>
+#include <stdio.h>
+#include <debug.h>
+
+//***************************************************************************
+// Definitions
+//***************************************************************************
+
+//***************************************************************************
+// Private Classes
+//***************************************************************************
+
+class CHelloWorld
+{
+  public:
+    CHelloWorld(void) : mSecret(42) { lldbg("Constructor\n"); };
+    ~CHelloWorld(void) { lldbg("Destructor\n"); };
+
+    bool HelloWorld(void)
+    {
+        if (mSecret != 42)
+          {
+            printf("CONSTRUCTION FAILED!\n");
+            return false;
+          }
+        else
+          {
+            printf("Hello, World!!\n");
+            return true;
+          }
+    };
+
+  private:
+    int mSecret;
+};
+
+//***************************************************************************
+// Private Data
+//***************************************************************************
+
+#ifndef CONFIG_EXAMPLE_HELLOXX_NOSTATICCONST 
+static CHelloWorld g_HelloWorld;
+#endif
+
+//***************************************************************************
+// Public Functions
+//***************************************************************************
+
+//***************************************************************************
+// user_initialize
+//***************************************************************************
+
+#ifndef CONFIG_HAVE_WEAKFUNCTIONS
+void user_initialize(void)
+{
+  // Stub that must be provided only if the toolchain does not support weak
+  // functions.
+}
+#endif
+
+//***************************************************************************
+// user_start
+//***************************************************************************
+
+int user_start(int argc, char *argv[])
+{
+#ifndef CONFIG_EXAMPLE_HELLOXX_NOSTACKCONST
+  CHelloWorld HelloWorld;
+#endif
+  CHelloWorld *pHelloWorld = new CHelloWorld;
+
+  printf("Saying hello from the dynamically constructed instance\n");
+  pHelloWorld->HelloWorld();
+
+#ifndef CONFIG_EXAMPLE_HELLOXX_NOSTACKCONST
+  printf("Saying hello from the statically constructed instance\n");
+  HelloWorld.HelloWorld();
+#endif
+
+#ifndef CONFIG_EXAMPLE_HELLOXX_NOSTATICCONST
+  printf("Saying hello from the statically constructed instance\n");
+  g_HelloWorld.HelloWorld();
+#endif
+
+  delete pHelloWorld;
+  return 0;
+}
+