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mcctrl: refactor prepare_image into new generic ikc send&wait

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Many ikc messages expecting a reply use wait_event_interruptible
incorrectly, freeing memory that could still be used on the other side.

This commit implements a generic ikc send and wait helper that helps
with memory management and ownership properly:
 - if the message succeeds and a reply comes back normally, the memory
is freed by the caller as usual
 - if the wait fails (signal before the reply comes or timeout) then the
memory is set as owner by ikc and will be free when the reply comes back
later
 - if the reply never comes, the memory is freed at shutdown when
destroying ikc channels

Refs: #1076
Change-Id: I7f348d9029a6ad56ba9a50c836105ec39fa14943
This commit is contained in:
Dominique Martinet
2018-06-21 19:12:59 +09:00
committed by Masamichi Takagi
parent ec202a1ca9
commit b939ca9370
6 changed files with 165 additions and 77 deletions
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executer/include/uprotocol.h
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@ -111,10 +111,8 @@ typedef unsigned long __cpu_set_unit;
struct program_load_desc {
int num_sections;
int status;
int cpu;
int pid;
int err;
int stack_prot;
int pgid;
int cred[8];