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Began work for waitpid() functionality.

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Changed the way a dying thread propagates its exit status and reason: we
no longer abuse the semaphore mechanism to carry an extra status value,
instead, wait_for_thread() registers a death_entry with the thread that
will be filled upon exit.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@9322 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler 2004-10-13 14:50:52 +00:00
parent 822e4e0b41
commit 2500c27b92
1 changed files with 17 additions and 4 deletions
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21
headers/private/kernel/thread_types.h
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@ -54,6 +54,14 @@ enum {
struct image;
// defined in image.c
struct death_entry {
struct list_link link;
team_id team;
thread_id thread;
status_t status;
uint32 reason;
};
struct team {
struct team *next; /* next team in the hash */
struct team *siblings_next;
@ -68,6 +76,8 @@ struct team {
int pending_signals;
void *io_context;
sem_id death_sem; /* semaphore to wait on for dying threads */
sem_id dead_child_sem; /* wait for dead child entries */
struct list dead_children;
vm_address_space *aspace;
vm_address_space *kaspace;
addr_t user_env_base;
@ -100,7 +110,6 @@ struct thread {
sem_id sem_blocking;
int sem_count;
int sem_acquire_count;
int sem_deleted_retcode;
int sem_errcode;
int sem_flags;
@ -120,9 +129,13 @@ struct thread {
thread_entry_func entry;
void *args1, *args2;
struct team *team;
status_t return_code;
sem_id return_code_sem;
int return_flags;
struct {
sem_id sem;
status_t status;
uint32 reason;
struct list waiters;
} exit;
// stack
region_id kernel_stack_region_id;