diff options
| author | Michael Brown <mcb30@ipxe.org> | 2012-06-09 18:48:09 +0100 |
|---|---|---|
| committer | Michael Brown <mcb30@ipxe.org> | 2012-06-09 18:48:28 +0100 |
| commit | 021d7b21b7f30a8de9ff56ae3a70026bafcdc542 (patch) | |
| tree | 152dfd6bf7f7a8622014bd938e7b12a48ac47c2a /src/include/ipxe | |
| parent | 591541af667dbf3617b81d89f92abf01e9e1a16d (diff) | |
| download | ipxe-021d7b21b7f30a8de9ff56ae3a70026bafcdc542.zip ipxe-021d7b21b7f30a8de9ff56ae3a70026bafcdc542.tar.gz ipxe-021d7b21b7f30a8de9ff56ae3a70026bafcdc542.tar.bz2 | |
[pending] Add concept of "pending operations"
iPXE is fundamentally asynchronous in operation: some operations
continue in the background even after the foreground has continued to
a new task. For example, the closing FIN/ACK exchanges of a TCP
connection will take place in the background after an HTTP download
has completed.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/include/ipxe')
| -rw-r--r-- | src/include/ipxe/errfile.h | 1 | ||||
| -rw-r--r-- | src/include/ipxe/pending.h | 34 |
2 files changed, 35 insertions, 0 deletions
diff --git a/src/include/ipxe/errfile.h b/src/include/ipxe/errfile.h index 108efc7..5fc0e08 100644 --- a/src/include/ipxe/errfile.h +++ b/src/include/ipxe/errfile.h @@ -62,6 +62,7 @@ FILE_LICENCE ( GPL2_OR_LATER ); #define ERRFILE_parseopt ( ERRFILE_CORE | 0x00160000 ) #define ERRFILE_test ( ERRFILE_CORE | 0x00170000 ) #define ERRFILE_xferbuf ( ERRFILE_CORE | 0x00180000 ) +#define ERRFILE_pending ( ERRFILE_CORE | 0x00190000 ) #define ERRFILE_eisa ( ERRFILE_DRIVER | 0x00000000 ) #define ERRFILE_isa ( ERRFILE_DRIVER | 0x00010000 ) diff --git a/src/include/ipxe/pending.h b/src/include/ipxe/pending.h new file mode 100644 index 0000000..51afb43 --- /dev/null +++ b/src/include/ipxe/pending.h @@ -0,0 +1,34 @@ +#ifndef _IPXE_PENDING_H +#define _IPXE_PENDING_H + +/** @file + * + * Pending operations + * + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +#include <ipxe/list.h> + +/** A pending operation */ +struct pending_operation { + /** Pending count */ + unsigned int count; +}; + +/** + * Check if an operation is pending + * + * @v pending Pending operation + * @v is_pending Operation is pending + */ +static inline int is_pending ( struct pending_operation *pending ) { + return ( pending->count != 0 ); +} + +extern void pending_get ( struct pending_operation *pending ); +extern void pending_put ( struct pending_operation *pending ); +extern int pending_wait ( unsigned long timeout ); + +#endif /* _IPXE_PENDING_H */ |