Let's avoid to use uv_default_loop() whereever possible

[Hiroaki Nakamura]

Instead, let's use uv_loop_t* luv_get_loop(lua_State *L).
And this function should be renamed to lev_get_loop() and moved to src/lev_new_base.c

The reason for avoiding uv_default_loop() is we should prepare so that we can have multiple uv loops in the future.

[kristopher tate]

How many instances of this are in code? Let's close this ASAP.

[Hiroaki Nakamura]

Here it is.

$ grep uv_default_loop src/*
src/lev_main.c:  r = uv_spawn(uv_default_loop(), &lworker->process, options);
src/lev_main.c:  loop = uv_default_loop();
src/lev_main.c:  uv_timer_init(uv_default_loop(), &gc_timer);
src/lev_new_base.c:  uv_default_loop()->data = L;
src/lev_new_core.c:  assert(uv_default_loop()->ev == loop);
src/lev_new_core.c:  struct ev_loop* loop = uv_default_loop()->ev;
src/lev_new_core.c:  uv_update_time(uv_default_loop());
src/lev_new_core.c:  double now = (double)uv_now(uv_default_loop());
src/lev_new_core.c:    uv_err_t err = uv_last_error(uv_default_loop());
src/lev_new_core.c:  uv_print_active_handles(uv_default_loop());
src/lev_new_core.c:  uv_print_all_handles(uv_default_loop());
src/lev_new_dns.c:  loop = uv_default_loop();
src/lev_new_pipe.c:  loop = uv_default_loop();
src/lev_new_process.c:  loop = uv_default_loop();
src/lev_new_tcp.c:  loop = uv_default_loop();
src/lev_new_udp.c:  loop = uv_default_loop();

Most of instances can be written as luv_get_loop(L).

[kristopher tate]

src/lev_main.c should be fine with uv_default_loop() since we have not yet inited Lua, et cetera.

[Hiroaki Nakamura]

Thanks for merging.