use common func wd_find_msg_in_pool to replace wd_xxx_get_msg

[gaozhangfei]

replace pr636, target to develop branch

[youngersh]

If you think it is unnecessary for alg.so, you should remove it from alg_SOURCE.

[gaozhangfei]

如果完全其他库Makefile删掉wd_sched.c wd_util.c,
那libwd.map 还需要export 蛮多函数的
这些函数都是其他库用到的，

/usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_alg_get_env_param' /usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_parse_async_poll_en'
/usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_get_msg_from_pool' /usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_check_ctx'
/usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_alg_attrs_init' /usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_ctx_param_init'
/usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_add_task_to_async_queue' /usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_clear_ctx_config'
/usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_alg_try_init' /usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_check_datalist'
/usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_check_src_dst' /usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_init_sched'
/usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_alg_uninit_driver' /usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_alg_drv_bind'
/usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_set_ctx_attr' /usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_alg_env_init'
/usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_uninit_async_request_pool' /usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_init_ctx_config'
/usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_clear_sched' /usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_alg_drv_unbind'
/usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_dlopen_drv' /usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_alg_env_uninit'
/usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_ctx_param_uninit' /usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_put_msg_to_pool'
/usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_alg_attrs_uninit' /usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_init_param_check'
/usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_handle_msg_sync' /usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_alg_init_driver'
/usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_parse_ctx_num' /usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_init_async_request_pool'
/usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_memset_zero' /usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_set_epoll_en'
/usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_get_lib_file_path' /usr/bin/ld: /home/linaro/work/uadk/.libs/libwd_crypto.so: undefined reference to wd_dlclose_drv'

•   wd_sched_rr_instance;
  

•   wd_sched_rr_alloc;
  

•   wd_sched_rr_release;
  

•   wd_find_msg_in_pool;
  

这几个函数是app 或者是驱动用到的。

[youngersh]

那这样的逻辑下你无法删除原有的引用，反而要在libwd中新增了wd_sched和wd_util，它的目的在于什么地方呢？如果说你把所有接口全部整改那这个逻辑我理解是成立的，所有公共部分全部放到libwd中，alg对公共的依赖由libwd提供就好。但是现在的修改方案既不能保证alg和公共文件的解耦，由让libwd和公共文件耦合，无法理解它的好处。

[youngersh]

仅我个人观点而言，第二个patch [uadk: use wd_find_msg_in_pool to replace wd_xxx_get_msg] 的修改不是很有必要，理由有：
1、msg算是一个对驱动开发者的南向接口，不是很有必要的情况下，最好不要动接口；
2、虽然当前的get msg看起来都是一层的封装，但是这个接口本身语义很明显，内部逻辑也不复杂，没有什么重复代码，假如涉及到公共部分的修改，仍然可以在find_msg中统一修改，但是如果涉及到算法的私有逻辑之后，当前的格式可以方便的进行适配，改了之后就不行了。

[gaozhangfei]

这是两个事情

1. 其他drv/应用程序 调用libwd的函数，
   因为肯定-lwd, 所以只要libwd 统一export 就行了。
   不然每个库都要export 一下，当然也是可以的，比如新加一个库，就也需要把这几个函数都export一下

2. 其他库调用libwd的函数，这个比较多，
   如果完全拆分，统一放libwd export 也行
   不拆分也行，其他库需要编译的时候包括下，
   两种都行，用户无感知，因为用不到

当然patch2 不要也行，只是简化下，不用每个库都export 下这几个app/drv 用到的函数

[Liulongfang]

It is recommended to put this patches to the PR: Adapter part2 #647