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author | Roberto Ierusalimschy <roberto@inf.puc-rio.br> | 2021-02-24 11:14:44 -0300 |
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committer | Roberto Ierusalimschy <roberto@inf.puc-rio.br> | 2021-02-24 11:14:44 -0300 |
commit | 59c88f846d1dcd901a4420651aedf27816618923 (patch) | |
tree | 0e76a066c383cbc99cc2f60b8b4f97c5df45e479 /lbaselib.c | |
parent | c03c527fd207b4ad8f5a8e0f4f2c176bd227c979 (diff) | |
download | lua-github-59c88f846d1dcd901a4420651aedf27816618923.tar.gz |
Broadening the use of branch hints
More uses of macros 'likely'/'unlikely' (renamed to
'l_likely'/'l_unlikely'), both in range (extended to the
libraries) and in scope (extended to hooks, stack growth).
Diffstat (limited to 'lbaselib.c')
-rw-r--r-- | lbaselib.c | 12 |
1 files changed, 6 insertions, 6 deletions
@@ -138,7 +138,7 @@ static int luaB_setmetatable (lua_State *L) { int t = lua_type(L, 2); luaL_checktype(L, 1, LUA_TTABLE); luaL_argexpected(L, t == LUA_TNIL || t == LUA_TTABLE, 2, "nil or table"); - if (luaL_getmetafield(L, 1, "__metatable") != LUA_TNIL) + if (l_unlikely(luaL_getmetafield(L, 1, "__metatable") != LUA_TNIL)) return luaL_error(L, "cannot change a protected metatable"); lua_settop(L, 2); lua_setmetatable(L, 1); @@ -300,7 +300,7 @@ static int luaB_ipairs (lua_State *L) { static int load_aux (lua_State *L, int status, int envidx) { - if (status == LUA_OK) { + if (l_likely(status == LUA_OK)) { if (envidx != 0) { /* 'env' parameter? */ lua_pushvalue(L, envidx); /* environment for loaded function */ if (!lua_setupvalue(L, -2, 1)) /* set it as 1st upvalue */ @@ -356,7 +356,7 @@ static const char *generic_reader (lua_State *L, void *ud, size_t *size) { *size = 0; return NULL; } - else if (!lua_isstring(L, -1)) + else if (l_unlikely(!lua_isstring(L, -1))) luaL_error(L, "reader function must return a string"); lua_replace(L, RESERVEDSLOT); /* save string in reserved slot */ return lua_tolstring(L, RESERVEDSLOT, size); @@ -394,7 +394,7 @@ static int dofilecont (lua_State *L, int d1, lua_KContext d2) { static int luaB_dofile (lua_State *L) { const char *fname = luaL_optstring(L, 1, NULL); lua_settop(L, 1); - if (luaL_loadfile(L, fname) != LUA_OK) + if (l_unlikely(luaL_loadfile(L, fname) != LUA_OK)) return lua_error(L); lua_callk(L, 0, LUA_MULTRET, 0, dofilecont); return dofilecont(L, 0, 0); @@ -402,7 +402,7 @@ static int luaB_dofile (lua_State *L) { static int luaB_assert (lua_State *L) { - if (lua_toboolean(L, 1)) /* condition is true? */ + if (l_likely(lua_toboolean(L, 1))) /* condition is true? */ return lua_gettop(L); /* return all arguments */ else { /* error */ luaL_checkany(L, 1); /* there must be a condition */ @@ -438,7 +438,7 @@ static int luaB_select (lua_State *L) { ** ignored). */ static int finishpcall (lua_State *L, int status, lua_KContext extra) { - if (status != LUA_OK && status != LUA_YIELD) { /* error? */ + if (l_unlikely(status != LUA_OK && status != LUA_YIELD)) { /* error? */ lua_pushboolean(L, 0); /* first result (false) */ lua_pushvalue(L, -2); /* error message */ return 2; /* return false, msg */ |