[libplugin] add

libplugin/Android.mk

@@ -0,0 +1,14 @@
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := libplugin
+
+LIBRARIES_DIR	:= $(LOCAL_PATH)/../
+
+LOCAL_C_INCLUDES := $(LOCAL_PATH)
+
+# Add your application source files here...
+LOCAL_SRC_FILES := libplugin.c
+
+include $(BUILD_SHARED_LIBRARY)

libplugin/Makefile

@@ -0,0 +1,104 @@
+###############################################################################
+# common
+###############################################################################
+#ARCH: linux/pi/android/ios/
+ARCH		?= linux
+CROSS_PREFIX	?=
+OUTPUT		?= /usr/local
+BUILD_DIR	:= $(shell pwd)/../build/
+ARCH_INC	:= $(BUILD_DIR)/$(ARCH).inc
+COLOR_INC	:= $(BUILD_DIR)/color.inc
+
+ifeq ($(ARCH_INC), $(wildcard $(ARCH_INC)))
+include $(ARCH_INC)
+endif
+
+CC	= $(CROSS_PREFIX)gcc
+CXX	= $(CROSS_PREFIX)g++
+LD	= $(CROSS_PREFIX)ld
+AR	= $(CROSS_PREFIX)ar
+
+ifeq ($(COLOR_INC), $(wildcard $(COLOR_INC)))
+include $(COLOR_INC)
+else
+CC_V	= $(CC)
+CXX_V	= $(CXX)
+LD_V	= $(LD)
+AR_V	= $(AR)
+CP_V	= $(CP)
+RM_V	= $(RM)
+endif
+
+###############################################################################
+# target and object
+###############################################################################
+LIBNAME		= libplugin
+VERSION_SH	= $(shell pwd)/version.sh $(LIBNAME)
+VER		= $(shell $(VERSION_SH); awk '/define\ $(LIBNAME)_version/{print $$3}' version.h)
+TGT_LIB_H	= $(LIBNAME).h
+TGT_LIB_A	= $(LIBNAME).a
+TGT_LIB_SO	= $(LIBNAME).so
+TGT_LIB_SO_VER	= $(TGT_LIB_SO).${VER}
+TGT_UNIT_TEST	= test_$(LIBNAME)
+
+OBJS_LIB	= $(LIBNAME).o
+OBJS_UNIT_TEST	= test_$(LIBNAME).o
+
+###############################################################################
+# cflags and ldflags
+###############################################################################
+CFLAGS	:= -g -Wall -Werror -fPIC
+CFLAGS	+= $($(ARCH)_CFLAGS)
+CFLAGS	+= -I$(OUTPUT)/include
+
+SHARED	:= -shared
+
+LDFLAGS	:= $($(ARCH)_LDFLAGS)
+LDFLAGS	+= -pthread -ldl
+
+###############################################################################
+# target
+###############################################################################
+.PHONY : all clean
+
+TGT	:= $(TGT_LIB_A)
+TGT	+= $(TGT_LIB_SO)
+TGT	+= $(TGT_UNIT_TEST)
+
+OBJS	:= $(OBJS_LIB) $(OBJS_UNIT_TEST)
+
+all: $(TGT)
+
+%.o:%.c
+	$(CC_V) -c $(CFLAGS) $< -o $@
+
+$(TGT_LIB_A): $(OBJS_LIB)
+	$(AR_V) rcs $@ $^
+
+$(TGT_LIB_SO): $(OBJS_LIB)
+	$(LD_V) -o $@ $^ $(SHARED)
+	@mv $(TGT_LIB_SO) $(TGT_LIB_SO_VER)
+	@ln -sf $(TGT_LIB_SO_VER) $(TGT_LIB_SO)
+
+$(TGT_UNIT_TEST): $(OBJS_UNIT_TEST) $(ANDROID_MAIN_OBJ)
+	$(CC_V) -o $@ $^ $(TGT_LIB_A) $(LDFLAGS)
+
+clean:
+	$(RM_V) -f $(OBJS)
+	$(RM_V) -f $(TGT)
+	$(RM_V) -f version.h
+	$(RM_V) -f $(TGT_LIB_SO)*
+	$(RM_V) -f $(TGT_LIB_SO_VER)
+
+install:
+	$(MAKEDIR_OUTPUT)
+	$(CP_V) -r $(TGT_LIB_H)  $(OUTPUT)/include
+	$(CP_V) -r $(TGT_LIB_A)  $(OUTPUT)/lib
+	$(CP_V) -r $(TGT_LIB_SO) $(OUTPUT)/lib
+	$(CP_V) -r $(TGT_LIB_SO_VER) $(OUTPUT)/lib
+
+uninstall:
+	$(RM_V) -f $(OUTPUT)/include/$(TGT_LIB_H)
+	$(RM_V) -f $(OUTPUT)/lib/$(TGT_LIB_A)
+	$(RM_V) -f $(OUTPUT)/lib/$(TGT_LIB_SO)
+	$(RM_V) -f $(OUTPUT)/lib/$(TGT_LIB_SO_VER)

libplugin/README.md

@@ -0,0 +1,3 @@
+## libplugin
+This is a simple libplugin library.
+

libplugin/libplugin.c

@@ -0,0 +1,130 @@
+/******************************************************************************
+ * Copyright (C) 2014-2018 Zhifeng Gong <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with libraries; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ ******************************************************************************/
+#include "libplugin.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <dlfcn.h>
+#include <libmacro.h>
+
+struct plugin_manager *plugin_manager_create()
+{
+    struct plugin_manager *pm = CALLOC(1, struct plugin_manager);
+    if (!pm) {
+        printf("malloc failed!\n");
+        return NULL;
+    }
+    INIT_LIST_HEAD(&pm->plugins);
+    return pm;
+}
+
+void plugin_manager_destroy(struct plugin_manager *pm)
+{
+    if (!pm) {
+        return;
+    }
+}
+
+static void *plugin_get_func(struct plugin *p, const char *name)
+{
+    if (!p || !name) {
+        return NULL;
+    }
+    struct plugin *q = dlsym(p->handle, name);
+    if (!q) {
+        printf("dlsym failed:%s\n", dlerror());
+        return NULL;
+    }
+    return q;
+}
+
+
+struct plugin *plugin_lookup(struct plugin_manager *pm, const char *name)
+{
+    if (!pm || !name)
+        return NULL;
+
+    struct list_head* head = NULL;
+    struct plugin* p = NULL;
+
+    list_for_each(head, &pm->plugins) {
+        p = list_entry(head, struct plugin, entry);
+        if (0 == strcmp(p->name, name)) {
+            return plugin_get_func(p, name);
+        }
+    }
+
+    return NULL;
+}
+
+struct plugin *plugin_load(struct plugin_manager *pm, const char *path, const char *name)
+{
+    struct plugin *sym = NULL;
+    struct plugin *p = NULL;
+    void *handle = dlopen(path, RTLD_LAZY);
+    if (!handle) {
+        printf("dlopen failed: %s\n", dlerror());
+        goto failed;
+    }
+    p = plugin_lookup(pm, name);
+    if (p) {
+        printf("plugin %s has already loaded!\n", name);
+        return p;
+    }
+    sym = dlsym(handle, name);
+    if (!sym) {
+        printf("incompatible plugin, dlsym failed: %s\n", dlerror());
+        goto failed;
+    }
+    p = CALLOC(1, struct plugin);
+    if (!p) {
+        goto failed;
+    }
+    p->handle = handle;
+    p->name = strdup(name);
+    p->path = strdup(path);
+    list_add(&p->entry, &pm->plugins);
+    return p;
+
+failed:
+    if (handle) dlclose(handle);
+    if (p) {
+        free(p->name);
+        free(p->path);
+        free(p);
+    }
+    return NULL;
+}
+
+void plugin_unload(struct plugin_manager *pm, const char *name)
+{
+    struct plugin *p, *tmp;
+    list_for_each_entry_safe(p, tmp, &pm->plugins, entry) {
+        dlclose(p->handle);
+        list_del(&p->entry);
+        free(p->name);
+        free(p->path);
+        free(p);
+    }
+}
+
+struct plugin *plugin_reload(struct plugin_manager *pm, const char *path, const char *name)
+{
+    plugin_unload(pm, name);
+    return plugin_load(pm, path, name);
+}

libplugin/libplugin.h

@@ -0,0 +1,62 @@
+/******************************************************************************
+ * Copyright (C) 2014-2018 Zhifeng Gong <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with libraries; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ ******************************************************************************/
+#ifndef LIBPLUGIN_H
+#define LIBPLUGIN_H
+
+#include <libmacro.h>
+#include <stdio.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct version {
+    int major;
+    int minor;
+    int patch;
+};
+
+struct plugin {
+    char *name;
+    char *path;
+    struct version version;
+
+    void *(*open)(void *arg);
+    void (*close)(void *arg);
+    void *(*call)(void *arg0, ...);
+
+    void *handle;
+    struct list_head entry;
+};
+
+struct plugin_manager {
+    struct list_head plugins;
+};
+
+struct plugin_manager *plugin_manager_create();
+void plugin_manager_destroy(struct plugin_manager *);
+
+struct plugin *plugin_lookup(struct plugin_manager *pm, const char *name);
+struct plugin *plugin_load(struct plugin_manager *pm, const char *path, const char *name);
+void plugin_unload(struct plugin_manager *pm, const char *name);
+struct plugin *plugin_reload(struct plugin_manager *pm, const char *path, const char *name);
+
+#ifdef __cplusplus
+}
+#endif
+#endif

libplugin/modules/Makefile

@@ -0,0 +1,80 @@
+###############################################################################
+# common
+###############################################################################
+#ARCH: linux/pi/android/ios/
+ARCH		?= linux
+CROSS_PREFIX	?=
+OUTPUT		?= /usr/local
+BUILD_DIR	:= $(shell pwd)/../build/
+ARCH_INC	:= $(BUILD_DIR)/$(ARCH).inc
+COLOR_INC	:= $(BUILD_DIR)/color.inc
+
+ifeq ($(ARCH_INC), $(wildcard $(ARCH_INC)))
+include $(ARCH_INC)
+endif
+
+CC	= $(CROSS_PREFIX)gcc
+CXX	= $(CROSS_PREFIX)g++
+LD	= $(CROSS_PREFIX)ld
+AR	= $(CROSS_PREFIX)ar
+
+ifeq ($(COLOR_INC), $(wildcard $(COLOR_INC)))
+include $(COLOR_INC)
+else
+CC_V	= $(CC)
+CXX_V	= $(CXX)
+LD_V	= $(LD)
+AR_V	= $(AR)
+CP_V	= $(CP)
+RM_V	= $(RM)
+endif
+
+###############################################################################
+# target and object
+###############################################################################
+LIBNAME		= libplugin
+VERSION_SH	= $(shell pwd)/version.sh $(LIBNAME)
+VER		= $(shell $(VERSION_SH); awk '/define\ $(LIBNAME)_version/{print $$3}' version.h)
+TGT_LIB_H	= $(LIBNAME).h
+TGT_LIB_SO	= plugin_log.so plugin_ipc.so plugin_skt.so
+
+OBJS_LIB	= plugin_log.o plugin_skt.o plugin_ipc.o
+
+###############################################################################
+# cflags and ldflags
+###############################################################################
+CFLAGS	:= -g -Wall -Werror -fPIC
+CFLAGS	+= $($(ARCH)_CFLAGS)
+CFLAGS	+= -I$(OUTPUT)/include
+
+SHARED	:= -shared
+
+LDFLAGS	:= $($(ARCH)_LDFLAGS)
+LDFLAGS	+= -pthread -ldl
+
+###############################################################################
+# target
+###############################################################################
+.PHONY : all clean
+
+TGT	:= $(TGT_LIB_SO)
+
+OBJS	:= $(OBJS_LIB)
+
+all: $(TGT)
+
+%.o:%.c
+	$(CC_V) -c $(CFLAGS) $< -o $@
+
+plugin_log.so: plugin_log.o
+	$(LD_V) -o $@ $^ $(SHARED)
+
+plugin_ipc.so: plugin_ipc.o
+	$(LD_V) -o $@ $^ $(SHARED)
+
+plugin_skt.so: plugin_skt.o
+	$(LD_V) -o $@ $^ $(SHARED)
+clean:
+	$(RM_V) -f $(OBJS)
+	$(RM_V) -f $(TGT)
+	$(RM_V) -f version.h