test: Add test-counter test

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>

test/Makefile

+SRCS	+= test-counter.c
 
+OBJS	:= $(patsubst %.c,%.o,$(SRCS))
+PROGS	:= $(patsubst %.c,%,$(SRCS))
+
+all: $(PROGS)
+
+$(PROGS): $(OBJS)
+	$(E) "  LINK    " $@
+	$(Q) $(CC) $< -o $@
+
+%.o: %.c
+	$(E) "  CC      " $@
+	$(Q) $(CC) -c $(CFLAGS) $< -o $@
+
+clean:
+	$(Q) $(RM) -f ./*.o
+	$(Q) $(RM) -f ./$(PROGS)
+.PHONY: clean

test/test-counter.c

+#include <stdio.h>
+#include <stdlib.h>
+
+#include <unistd.h>
+
+#include <sys/types.h>
+
+int main(int argc, char *argv[])
+{
+	int counter = 0;
+
+	while (1) {
+		printf("Pid: %10d Counter: %10d\n",
+		       getpid(), counter++);
+		sleep(3);
+	}
+
+	return 0;
+}