1)初始化：
dfb_wm_core_initialize( coredfb *core,
dfbwmcore *data,
dfbwmcoreshared *shared )
%%%b /* %%%b表示注釋開始，%%%e結束/
由dfb_core_part_initialize呼叫
if (core_part->size_local)
local = d_calloc( 1, core_part->size_local );//本地資料system mem
if (core_part->size_shared)
shared = shcalloc( pool, 1, core_part->size_shared );//共享資料shared mem
ret = core_part->initialize( core, local, shared );
其中：/* allocate local core structure. */
core 是dfb_core_create( coredfb **ret_core )中的
core = d_calloc( 1, sizeof(coredfb) );
pool是dfb_core_arena_initialize函式中建立的pool
ret = fusion_shm_pool_create( core->world, "directfb main pool", 0x400000,
fusion_config->debugshm, &pool ); */
/* allocate shared structure in the new pool. */
shared = shcalloc( pool, 1, sizeof(coredfbshared) );
if (!shared) {
fusion_shm_pool_destroy( core->world, pool );
return d_ooshm();
core->shared = shared;
core->master = true;
shared->shmpool = pool;
需要注意下巨集：dfb_window_manager( default )
%%%e
dfb_wm_core_initialize初始化過程：
%%% 給wm的各個指標賦值
data->core = core;
data->shared = shared;
wm_local = data; /* fixme */
wm_shared = shared; /* fixme */
%%% wm_shared->shmpool指向pool
wm_shared->shmpool = dfb_core_shmpool( core );
%%%b
載入libdirectfbwm_default.so (分為：default 和 unique，預設為default)
%%%e
/* load the module. */
ret = load_module( dfb_config->wm );
%%%呼叫default.c中的函式wm_get_info
/* query module information. */
wm_local->funcs->getwminfo( &wm_shared->info );
/* store module name in shared memory. */
wm_shared->name = shstrdup( wm_shared->shmpool, wm_local->module->name );
if (!wm_shared->name) {
d_ooshm();
goto error;
/* allocate shared window manager data. */
if (wm_shared->info.wm_shared_size) {
wm_shared->data = shcalloc( wm_shared->shmpool, 1, wm_shared->info.wm_shared_size );
if (!wm_shared->data) {
d_ooshm();
goto error;
ret = dfb_nosystemmemory;
/* allocate local window manager data. */
if (wm_shared->info.wm_data_size) {
wm_local->data = d_calloc( 1, wm_shared->info.wm_data_size );
if (!wm_local->data) {
d_oom();
goto error;
%%% 呼叫default中的初始化函式 即 default.c中的wm_initialize
/* initialize window manager. */
ret = wm_local->funcs->initialize( core, wm_local->data, wm_shared->data );
if (ret) {
d_derror( ret, "directfb/core/wm: could not initialize window manager!/n" );
goto error;
d_magic_set( data, dfbwmcore );
d_magic_set( shared, dfbwmcoreshared );
return dfb_ok;
dfbresult
dfb_wm_init_stack( corewindowstack *stack )
dfbresult
idirectfb_construct( idirectfb *thiz, coredfb *core )
-》dfb_layer_get_primary_context-》dfb_layer_create_context-》dfb_layer_context_init-》
dfb_windowstack_create-》dfb_wm_init_stack
%%%b
corelayercontext *
dfb_core_create_layer_context( coredfb *core )
coredfbshared *shared;
d_assume( core != null );
if (!core)
core = core_dfb;
d_magic_assert( core, coredfb );
shared = core->shared;
d_magic_assert( shared, coredfbshared );
d_assert( shared->layer_context_pool != null );
return (corelayercontext*) fusion_object_create( shared->layer_context_pool, core->world );
static dfbresult
dfb_core_initialize( coredfb *core )
shared->layer_context_pool = dfb_layer_context_pool_create( core->world );
shared->layer_region_pool = dfb_layer_region_pool_create( core->world );
shared->palette_pool = dfb_palette_pool_create( core->world );
shared->su***ce_pool = dfb_su***ce_pool_create( core->world );
shared->window_pool = dfb_window_pool_create( core->world );
corewindowstack*
dfb_windowstack_create( corelayercontext *context )
/* allocate window stack data (completely shared) */
stack = (corewindowstack*) shcalloc( context->shmpool, 1, sizeof(corewindowstack) );
if (!stack) {
d_ooshm();
return null;
stack->shmpool = context->shmpool;
%%%e
#define max_update_regions 8
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