diff options
Diffstat (limited to 'data/lighttpd/lighttpd-1.4.53/src/mod_magnet_cache.c')
-rw-r--r-- | data/lighttpd/lighttpd-1.4.53/src/mod_magnet_cache.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/data/lighttpd/lighttpd-1.4.53/src/mod_magnet_cache.c b/data/lighttpd/lighttpd-1.4.53/src/mod_magnet_cache.c new file mode 100644 index 000000000..204bb8e16 --- /dev/null +++ b/data/lighttpd/lighttpd-1.4.53/src/mod_magnet_cache.c @@ -0,0 +1,129 @@ +#include "first.h" + +#include "mod_magnet_cache.h" +#include "base.h" +#include "stat_cache.h" + +#include <stdlib.h> +#include <time.h> + +#include <lualib.h> +#include <lauxlib.h> + +static script *script_init() { + script *sc; + + sc = calloc(1, sizeof(*sc)); + sc->name = buffer_init(); + sc->etag = buffer_init(); + + return sc; +} + +static void script_free(script *sc) { + if (!sc) return; + + lua_pop(sc->L, 1); /* the function copy */ + + buffer_free(sc->name); + buffer_free(sc->etag); + + lua_close(sc->L); + + free(sc); +} + +script_cache *script_cache_init() { + script_cache *p; + + p = calloc(1, sizeof(*p)); + + return p; +} + +void script_cache_free(script_cache *p) { + size_t i; + + if (!p) return; + + for (i = 0; i < p->used; i++) { + script_free(p->ptr[i]); + } + + free(p->ptr); + + free(p); +} + +lua_State *script_cache_get_script(server *srv, connection *con, script_cache *cache, buffer *name) { + size_t i; + script *sc = NULL; + stat_cache_entry *sce; + + for (i = 0; i < cache->used; i++) { + sc = cache->ptr[i]; + + if (buffer_is_equal(name, sc->name)) { + sc->last_used = time(NULL); + + /* oops, the script failed last time */ + + if (lua_gettop(sc->L) == 0) break; + force_assert(lua_gettop(sc->L) == 1); + + if (HANDLER_ERROR == stat_cache_get_entry(srv, con, sc->name, &sce)) { + lua_pop(sc->L, 1); /* pop the old function */ + break; + } + + stat_cache_etag_get(sce, con->etag_flags); + if (!buffer_is_equal(sce->etag, sc->etag)) { + /* the etag is outdated, reload the function */ + lua_pop(sc->L, 1); + break; + } + + force_assert(lua_isfunction(sc->L, -1)); + + return sc->L; + } + + sc = NULL; + } + + /* if the script was script already loaded but either got changed or + * failed to load last time */ + if (sc == NULL) { + sc = script_init(); + + if (cache->size == 0) { + cache->size = 16; + cache->ptr = malloc(cache->size * sizeof(*(cache->ptr))); + } else if (cache->used == cache->size) { + cache->size += 16; + cache->ptr = realloc(cache->ptr, cache->size * sizeof(*(cache->ptr))); + } + + cache->ptr[cache->used++] = sc; + + buffer_copy_buffer(sc->name, name); + + sc->L = luaL_newstate(); + luaL_openlibs(sc->L); + } + + sc->last_used = time(NULL); + + if (0 != luaL_loadfile(sc->L, name->ptr)) { + /* oops, an error, return it */ + return sc->L; + } + + if (HANDLER_GO_ON == stat_cache_get_entry(srv, con, sc->name, &sce)) { + buffer_copy_buffer(sc->etag, stat_cache_etag_get(sce, con->etag_flags)); + } + + force_assert(lua_isfunction(sc->L, -1)); + + return sc->L; +} |