diff options
Diffstat (limited to 'doc/objects-requests.txt')
-rw-r--r-- | doc/objects-requests.txt | 25 |
1 files changed, 0 insertions, 25 deletions
diff --git a/doc/objects-requests.txt b/doc/objects-requests.txt deleted file mode 100644 index e53c343..0000000 --- a/doc/objects-requests.txt +++ /dev/null @@ -1,25 +0,0 @@ -The requests can be of two types : -- Blocking, IE the sender waits for an answer -- Nonblocking, the request is a simple message. - -Requests are identified by a 32bit function number, composed as follows : - (8 bit) parameter and return type ; (24bit) function number - -the first 8 bits are : - 2bit answer type ; 2bit parameter a type ; 2bit parameter b type ; 2bit parameter c type - -each two bit couple can be one of the following : -- 00 : void -- 01 : object descriptor number (will be copied with a new number to reciever) -- 10 : long -- 11 : long long (replies), or shared memory offset in sender's space (requests and messages) - -When shared memory segments are sent as request parameters from a process to the same process, the pointer -to the memory is kept and sent to the handler function. If handler is in another process, receiver will -have to call request_mapShm specifying a pointer. Shared memory is automatically unmapped when requests -yields an answer, and is kept when the request is nonblocking (message). - -When objects are sent as request parameters, the receiver process will get an immediately usable object -descriptor. The descriptor is closed in blocking requests after the request yields an answer (except if the -request is handled in the same process than the sender, OR if the receiver already had a descriptor to -this object). The descriptor is kept when sent by a nonblocking request (message). |