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lua: docs and tests for vim.schedule

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This commit is contained in:
Björn Linse
2019-06-04 19:32:43 +02:00
parent 81e1dbca99
commit b684bd05b5
4 changed files with 58 additions and 35 deletions
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35
src/nvim/lua/executor.c
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@@ -36,12 +36,6 @@ typedef struct {
String lua_err_str;
} LuaError;
/// We use this to store Lua callbacks
typedef struct {
// TODO: store more info for debugging, traceback?
int cb;
} nlua_ctx;
#ifdef INCLUDE_GENERATED_DECLARATIONS
# include "lua/vim_module.generated.h"
# include "lua/executor.c.generated.h"
@@ -114,33 +108,32 @@ static int nlua_stricmp(lua_State *const lstate) FUNC_ATTR_NONNULL_ALL
return 1;
}
static void nlua_schedule_cb(void **argv)
static void nlua_schedule_event(void **argv)
{
nlua_ctx *ctx = argv[0];
LuaRef cb = (LuaRef)(ptrdiff_t)argv[0];
lua_State *const lstate = nlua_enter();
lua_rawgeti(lstate, LUA_REGISTRYINDEX, ctx->cb);
luaL_unref(lstate, LUA_REGISTRYINDEX, ctx->cb);
lua_pcall(lstate, 0, 0, 0);
free(ctx);
nlua_pushref(lstate, cb);
nlua_unref(lstate, cb);
if (lua_pcall(lstate, 0, 0, 0)) {
nlua_error(lstate, _("Error executing vim.schedule lua callback: %.*s"));
}
}
/// Schedule Lua callback on main loop's event queue
///
/// This is used to make sure nvim API is called at the right moment.
///
/// @param lstate Lua interpreter state.
/// @param[in] msg Message base, must contain one `%s`.
static int nlua_schedule(lua_State *const lstate)
FUNC_ATTR_NONNULL_ALL
{
// TODO: report error using nlua_error instead
luaL_checktype(lstate, 1, LUA_TFUNCTION);
if (lua_type(lstate, 1) != LUA_TFUNCTION) {
lua_pushliteral(lstate, "vim.schedule: expected function");
return lua_error(lstate);
}
nlua_ctx* ctx = (nlua_ctx*)malloc(sizeof(nlua_ctx));
lua_pushvalue(lstate, 1);
ctx->cb = luaL_ref(lstate, LUA_REGISTRYINDEX);
LuaRef cb = nlua_ref(lstate, 1);
multiqueue_put(main_loop.events, nlua_schedule_cb, 1, ctx);
multiqueue_put(main_loop.events, nlua_schedule_event,
1, (void *)(ptrdiff_t)cb);
return 0;
}