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win: split struct win

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Currently compton handles window creation event by immediately query all
the information it needs and create a window struct with that
information. However, this is prone to race conditions.

In the future, we want to react to window creation event by creating a
placeholder in the window stack, and only query window information in a
critical section where the X server is grabbed by us.

This commit split struct win into two struct, one as placeholder, the
other for holding actual window information.

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
This commit is contained in:
Yuxuan Shui
2019-04-17 23:14:45 +01:00
parent 27603343a1
commit bd4c242015
17 changed files with 699 additions and 514 deletions
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16
src/backend/backend.h
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@@ -11,7 +11,7 @@
#include "x.h"
typedef struct session session_t;
typedef struct win win;
struct managed_win;
struct backend_operations;
@@ -48,7 +48,7 @@ struct backend_operations {
/// 1) if ps->overlay is not XCB_NONE, use that
/// 2) use ps->root otherwise
/// TODO make the target window a parameter
backend_t *(*init)(session_t *) attr_nonnull(1);
backend_t *(*init)(session_t *)attr_nonnull(1);
void (*deinit)(backend_t *backend_data) attr_nonnull(1);
/// Called when rendering will be stopped for an unknown amount of
@@ -92,7 +92,7 @@ struct backend_operations {
/// Fill rectangle of target, mostly for debug purposes, optional.
void (*fill)(backend_t *backend_data, double r, double g, double b, double a,
const region_t *clip);
const region_t *clip);
/// Blur a given region of the target.
bool (*blur)(backend_t *backend_data, double opacity, const region_t *reg_blur,
@@ -129,8 +129,7 @@ struct backend_operations {
// want to break that assumption as for now. We need to reconsider this.
/// Free resources associated with an image data structure
void (*release_image)(backend_t *backend_data, void *img_data)
attr_nonnull(1, 2);
void (*release_image)(backend_t *backend_data, void *img_data) attr_nonnull(1, 2);
// =========== Query ===========
@@ -179,12 +178,11 @@ struct backend_operations {
/// Let the backend hook into the event handling queue
};
typedef backend_t *(*backend_init_fn)(session_t *ps) attr_nonnull(1);
typedef backend_t *(*backend_init_fn)(session_t *ps)attr_nonnull(1);
extern struct backend_operations *backend_list[];
bool default_is_win_transparent(void *, win *, void *);
bool default_is_frame_transparent(void *, win *, void *);
void paint_all_new(session_t *ps, win *const t, bool ignore_damage) attr_nonnull(1);
void paint_all_new(session_t *ps, struct managed_win *const t, bool ignore_damage)
attr_nonnull(1);
// vim: set noet sw=8 ts=8 :