diff options
Diffstat (limited to 'include/sysemu/char.h')
| -rw-r--r-- | include/sysemu/char.h | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/include/sysemu/char.h b/include/sysemu/char.h index bd2b62d21a..c8b15f9729 100644 --- a/include/sysemu/char.h +++ b/include/sysemu/char.h @@ -54,6 +54,7 @@ typedef struct { typedef void IOEventHandler(void *opaque, int event); struct CharDriverState { + QemuMutex chr_write_lock; void (*init)(struct CharDriverState *s); int (*chr_write)(struct CharDriverState *s, const uint8_t *buf, int len); int (*chr_sync_read)(struct CharDriverState *s, @@ -164,6 +165,7 @@ void qemu_chr_fe_event(CharDriverState *s, int event); * @qemu_chr_fe_printf: * * Write to a character backend using a printf style interface. + * This function is thread-safe. * * @fmt see #printf */ @@ -176,8 +178,9 @@ int qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond, /** * @qemu_chr_fe_write: * - * Write data to a character backend from the front end. This function will - * send data from the front end to the back end. + * Write data to a character backend from the front end. This function + * will send data from the front end to the back end. This function + * is thread-safe. * * @buf the data * @len the number of bytes to send @@ -192,7 +195,7 @@ int qemu_chr_fe_write(CharDriverState *s, const uint8_t *buf, int len); * Write data to a character backend from the front end. This function will * send data from the front end to the back end. Unlike @qemu_chr_fe_write, * this function will block if the back end cannot consume all of the data - * attempted to be written. + * attempted to be written. This function is thread-safe. * * @buf the data * @len the number of bytes to send @@ -216,7 +219,7 @@ int qemu_chr_fe_read_all(CharDriverState *s, uint8_t *buf, int len); /** * @qemu_chr_fe_ioctl: * - * Issue a device specific ioctl to a backend. + * Issue a device specific ioctl to a backend. This function is thread-safe. * * @cmd see CHR_IOCTL_* * @arg the data associated with @cmd |