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patch 8.0.0957: a terminal job can deadlock when sending many keys

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Problem:    When term_sendkeys() sends many keys it may get stuck in writing
            to the job.
Solution:   Make the write non-blocking, buffer keys to be sent.
This commit is contained in:
Bram Moolenaar
2017-08-18 20:50:30 +02:00
parent cfce71710b
commit 97bd5e6527
6 changed files with 217 additions and 39 deletions
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10
src/structs.h
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@@ -1196,6 +1196,7 @@ typedef struct partial_S partial_T;
typedef struct jobvar_S job_T;
typedef struct readq_S readq_T;
typedef struct writeq_S writeq_T;
typedef struct jsonq_S jsonq_T;
typedef struct cbq_S cbq_T;
typedef struct channel_S channel_T;
@@ -1512,6 +1513,13 @@ struct readq_S
readq_T *rq_prev;
};
struct writeq_S
{
garray_T wq_ga;
writeq_T *wq_next;
writeq_T *wq_prev;
};
struct jsonq_S
{
typval_T *jq_value;
@@ -1601,6 +1609,8 @@ typedef struct {
#endif
int ch_block_write; /* for testing: 0 when not used, -1 when write
* does not block, 1 simulate blocking */
int ch_nonblocking; /* write() is non-blocking */
writeq_T ch_writeque; /* header for write queue */
cbq_T ch_cb_head; /* dummy node for per-request callbacks */
char_u *ch_callback; /* call when a msg is not handled */