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Implement streams IPC mechanism
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This commit is contained in:
Kamil Kowalczyk
2026-03-18 22:27:56 +01:00
parent 77ab25bcee
commit 80a728f04b
22 changed files with 311 additions and 50 deletions
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66
kernel/syscall/syscall.c
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@@ -1033,6 +1033,70 @@ DEFINE_SYSCALL (sys_get_self_pid) {
return SYSRESULT (pid);
}
/* int stream_write (int pgid, int rid, void* buffer, size_t size) */
DEFINE_SYSCALL (sys_stream_write) {
uint64_t fp;
int pgid = (int)a1;
int rid = (int)a2;
uintptr_t uvaddr_buffer = a3;
size_t buffer_size = (size_t)a4;
struct procgroup* target_procgroup = procgroup_find (pgid);
if (target_procgroup == NULL)
return SYSRESULT (-ST_NOT_FOUND);
spin_lock (&proc->lock, &fp);
struct procgroup* procgroup = proc->procgroup;
spin_unlock (&proc->lock, fp);
void* buffer = sys_get_user_buffer (procgroup, uvaddr_buffer, buffer_size);
if (buffer == NULL)
return SYSRESULT (-ST_BAD_ADDRESS_SPACE);
struct proc_resource* stream_resource = proc_find_resource (target_procgroup, rid);
if (stream_resource == NULL)
return SYSRESULT (-ST_NOT_FOUND);
proc_stream_write (proc, &stream_resource->u.stream, rctx, buffer, buffer_size);
return SYSRESULT (ST_OK);
}
/* int stream_read (int pgid, int rid, void* buffer, size_t size) */
DEFINE_SYSCALL (sys_stream_read) {
uint64_t fp;
int pgid = (int)a1;
int rid = (int)a2;
uintptr_t uvaddr_buffer = a3;
size_t buffer_size = (size_t)a4;
struct procgroup* target_procgroup = procgroup_find (pgid);
if (target_procgroup == NULL)
return SYSRESULT (-ST_NOT_FOUND);
spin_lock (&proc->lock, &fp);
struct procgroup* procgroup = proc->procgroup;
spin_unlock (&proc->lock, fp);
void* buffer = sys_get_user_buffer (procgroup, uvaddr_buffer, buffer_size);
if (buffer == NULL)
return SYSRESULT (-ST_BAD_ADDRESS_SPACE);
struct proc_resource* stream_resource = proc_find_resource (target_procgroup, rid);
if (stream_resource == NULL)
return SYSRESULT (-ST_NOT_FOUND);
return SYSRESULT (proc_stream_read (proc, &stream_resource->u.stream, rctx, buffer, buffer_size));
}
static syscall_handler_func_t handler_table[] = {
[SYS_QUIT] = &sys_quit,
[SYS_TEST] = &sys_test,
@@ -1069,6 +1133,8 @@ static syscall_handler_func_t handler_table[] = {
[SYS_EXEC_PARTIAL_FINI] = &sys_exec_partial_fini,
[SYS_MAIL_RECEIVE_NONBLOCK] = &sys_mail_receive_nonblock,
[SYS_GET_SELF_PID] = &sys_get_self_pid,
[SYS_STREAM_WRITE] = &sys_stream_write,
[SYS_STREAM_READ] = &sys_stream_read,
};
syscall_handler_func_t syscall_find_handler (int syscall_num) {