motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-04 16:23:55 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

char: introduce CharBackend

Browse source 
This new structure is meant to keep the details associated with a char
driver usage. On initialization, it gets a tag from the mux backend.
It can change its handlers thanks to qemu_chr_fe_set_handlers().

This structure is introduced so that all frontend will be moved to hold
and use a CharBackend. This will allow to better track char usage and
allocation, and help prevent some memory leaks or corruption.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-10-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Marc-André Lureau 2016-10-22 12:52:49 +03:00 • committed by Paolo Bonzini
parent 6dfa8298fa
commit 94a40fc560
2 changed files with 100 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

50
include/sysemu/char.h
View file

@ -72,6 +72,12 @@ typedef enum {
QEMU_CHAR_FEATURE_LAST,
} CharDriverFeature;
/* This is the backend as seen by frontend, the actual backend is
* CharDriverState */
typedef struct CharBackend {
CharDriverState *chr;
int tag;
} CharBackend;
struct CharDriverState {
QemuMutex chr_write_lock;
@ -156,6 +162,8 @@ void qemu_chr_parse_common(QemuOpts *opts, ChardevCommon *backend);
* Returns: a new character backend
*/
CharDriverState *qemu_chr_new(const char *label, const char *filename);
/**
* @qemu_chr_disconnect:
*
@ -425,6 +433,48 @@ void qemu_chr_be_write_impl(CharDriverState *s, uint8_t *buf, int len);
*/
void qemu_chr_be_event(CharDriverState *s, int event);
/**
* @qemu_chr_fe_init:
*
* Initializes a front end for the given CharBackend and CharDriver.
*
* Returns: false on error.
*/
bool qemu_chr_fe_init(CharBackend *b, CharDriverState *s, Error **errp);
/**
* @qemu_chr_fe_get_driver:
*
* Returns the driver associated with a CharBackend or NULL.
*/
CharDriverState *qemu_chr_fe_get_driver(CharBackend *be);
/**
* @qemu_chr_fe_set_handlers:
* @b: a CharBackend
* @fd_can_read: callback to get the amount of data the frontend may
* receive
* @fd_read: callback to receive data from char
* @fd_event: event callback
* @opaque: an opaque pointer for the callbacks
* @context: a main loop context or NULL for the default
*
* Set the front end char handlers.
*/
void qemu_chr_fe_set_handlers(CharBackend *b,
IOCanReadHandler *fd_can_read,
IOReadHandler *fd_read,
IOEventHandler *fd_event,
void *opaque,
GMainContext *context);
/**
* @qemu_chr_fe_take_focus:
*
* Take the focus (if the front end is muxed)
*/
void qemu_chr_fe_take_focus(CharBackend *b);
void qemu_chr_add_handlers(CharDriverState *s,
IOCanReadHandler *fd_can_read,
IOReadHandler *fd_read,