diff options
| author | ivan <ivan@13f79535-47bb-0310-9956-ffa450edef68> | 2019-05-27 07:27:59 +0000 |
|---|---|---|
| committer | ivan <ivan@13f79535-47bb-0310-9956-ffa450edef68> | 2019-05-27 07:27:59 +0000 |
| commit | 85f0a473793507a857dfb76a25f2348ce9a1d636 (patch) | |
| tree | 921876e93a219a1eff6174d1f1b7716cdf13e64a | |
| parent | 0c2bd5615d1763ab7b6002a26a5160e13fbeef25 (diff) | |
| download | libapr-85f0a473793507a857dfb76a25f2348ce9a1d636.tar.gz | |
Use manual reset events for OVERLAPPED I/O on Windows: I/O operations reset
provided event to non-signaled state automatically [1]. Using automatic reset
events is not recommended:
[[[
Functions such as ReadFile and WriteFile set this handle to the nonsignaled
state before they begin an I/O operation. When the operation has completed,
the handle is set to the signaled state.
Functions such as GetOverlappedResult and the synchronization wait functions
reset auto-reset events to the nonsignaled state. Therefore, you should use a
manual reset event; if you use an auto-reset event, your application can stop
responding if you wait for the operation to complete and then call
GetOverlappedResult with the bWait parameter set to TRUE.
]]]
[1] https://docs.microsoft.com/en-gb/windows/desktop/api/minwinbase/ns-minwinbase-_overlapped
git-svn-id: http://svn.apache.org/repos/asf/apr/apr/trunk@1860110 13f79535-47bb-0310-9956-ffa450edef68
| -rw-r--r-- | file_io/win32/pipe.c | 4 | ||||
| -rw-r--r-- | file_io/win32/readwrite.c | 6 |
2 files changed, 5 insertions, 5 deletions
diff --git a/file_io/win32/pipe.c b/file_io/win32/pipe.c index b13507a91..8de7822af 100644 --- a/file_io/win32/pipe.c +++ b/file_io/win32/pipe.c @@ -146,7 +146,7 @@ static apr_status_t file_pipe_create(apr_file_t **in, dwOpenMode |= FILE_FLAG_OVERLAPPED; (*in)->pOverlapped = (OVERLAPPED*) apr_pcalloc((*in)->pool, sizeof(OVERLAPPED)); - (*in)->pOverlapped->hEvent = CreateEvent(NULL, FALSE, FALSE, NULL); + (*in)->pOverlapped->hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); (*in)->timeout = 0; } dwPipeMode = 0; @@ -181,7 +181,7 @@ static apr_status_t file_pipe_create(apr_file_t **in, dwOpenMode |= FILE_FLAG_OVERLAPPED; (*out)->pOverlapped = (OVERLAPPED*) apr_pcalloc((*out)->pool, sizeof(OVERLAPPED)); - (*out)->pOverlapped->hEvent = CreateEvent(NULL, FALSE, FALSE, NULL); + (*out)->pOverlapped->hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); (*out)->timeout = 0; } diff --git a/file_io/win32/readwrite.c b/file_io/win32/readwrite.c index 31c14fcbb..23d2358e7 100644 --- a/file_io/win32/readwrite.c +++ b/file_io/win32/readwrite.c @@ -247,7 +247,7 @@ APR_DECLARE(apr_status_t) apr_file_read(apr_file_t *thefile, void *buf, apr_size if ((thefile->flags & APR_FOPEN_XTHREAD) && !thefile->pOverlapped ) { thefile->pOverlapped = (OVERLAPPED*) apr_pcalloc(thefile->pool, sizeof(OVERLAPPED)); - thefile->pOverlapped->hEvent = CreateEvent(NULL, FALSE, FALSE, NULL); + thefile->pOverlapped->hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); if (!thefile->pOverlapped->hEvent) { rv = apr_get_os_error(); return rv; @@ -394,7 +394,7 @@ APR_DECLARE(apr_status_t) apr_file_write(apr_file_t *thefile, const void *buf, a if ((thefile->flags & APR_FOPEN_XTHREAD) && !thefile->pOverlapped ) { thefile->pOverlapped = (OVERLAPPED*) apr_pcalloc(thefile->pool, sizeof(OVERLAPPED)); - thefile->pOverlapped->hEvent = CreateEvent(NULL, FALSE, FALSE, NULL); + thefile->pOverlapped->hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); if (!thefile->pOverlapped->hEvent) { rv = apr_get_os_error(); return rv; @@ -630,7 +630,7 @@ APR_DECLARE(apr_status_t) apr_file_gets(char *str, int len, apr_file_t *thefile) if ((thefile->flags & APR_FOPEN_XTHREAD) && !thefile->pOverlapped) { thefile->pOverlapped = (OVERLAPPED*) apr_pcalloc(thefile->pool, sizeof(OVERLAPPED)); - thefile->pOverlapped->hEvent = CreateEvent(NULL, FALSE, FALSE, NULL); + thefile->pOverlapped->hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); if (!thefile->pOverlapped->hEvent) { rv = apr_get_os_error(); return rv; |