feat: IO polling for file descriptor

[lunaix-os.git] / lunaix-os / kernel / process / sched.c

diff --git a/lunaix-os/kernel/process/sched.c b/lunaix-os/kernel/process/sched.c
index acf04b72111d6136cf77fbcc2a0e2fa329346bc9..405602199291d2c9f27548ac2cd6b8394b5b1856 100644 (file)
--- a/lunaix-os/kernel/process/sched.c
+++ b/lunaix-os/kernel/process/sched.c
@@ -1,8 +1,9 @@
-#include <arch/abi.h>
-#include <arch/x86/interrupts.h>
+#include <sys/abi.h>
+#include <sys/interrupts.h>
+#include <sys/mm/mempart.h>
 
-#include <hal/apic.h>
-#include <hal/cpu.h>
+#include <hal/intc.h>
+#include <sys/cpu.h>
 
 #include <lunaix/fs/taskfs.h>
 #include <lunaix/mm/cake.h>
@@ -60,29 +61,13 @@ sched_init_dummy()
     extern void my_dummy();
     static char dummy_stack[DUMMY_STACK_SIZE] __attribute__((aligned(16)));
 
-    struct exec_param* execp =
-      (void*)dummy_stack + DUMMY_STACK_SIZE - sizeof(struct exec_param);
+    ptr_t stktop = (ptr_t)dummy_stack + DUMMY_STACK_SIZE;
 
-    isr_param* isrp = (void*)execp - sizeof(isr_param);
-
-    *execp = (struct exec_param){
-        .cs = KCODE_SEG,
-        .eflags = cpu_reflags() | 0x0200,
-        .eip = (ptr_t)my_dummy,
-        .ss = KDATA_SEG,
-    };
-
-    *isrp = (isr_param){ .registers = { .ds = KDATA_SEG,
-                                        .es = KDATA_SEG,
-                                        .fs = KDATA_SEG,
-                                        .gs = KDATA_SEG },
-                         .execp = execp };
-
-    // memset to 0
     dummy_proc = (struct proc_info){};
-    dummy_proc.intr_ctx = isrp;
 
-    dummy_proc.page_table = cpu_rcr3();
+    proc_init_transfer(&dummy_proc, stktop, (ptr_t)my_dummy, TRANSFER_IE);
+
+    dummy_proc.page_table = cpu_ldvmspace();
     dummy_proc.state = PS_READY;
     dummy_proc.parent = &dummy_proc;
     dummy_proc.pid = KERNEL_PID;
@@ -95,20 +80,8 @@ run(struct proc_info* proc)
 {
     proc->state = PS_RUNNING;
 
-    /*
-        将tss.esp0设置为上次调度前的esp值。
-        当处理信号时，上下文信息是不会恢复的，而是保存在用户栈中，然后直接跳转进位于用户空间的sig_wrapper进行
-          信号的处理。当用户自定义的信号处理函数返回时，sigreturn的系统调用才开始进行上下文的恢复（或者说是进行
-          另一次调度。
-        由于这中间没有进行地址空间的交换，所以第二次跳转使用的是同一个内核栈，而之前默认tss.esp0的值是永远指向最顶部
-        这样一来就有可能会覆盖更早的上下文信息（比如嵌套的信号捕获函数）
-    */
-
-    apic_done_servicing();
-
-    asm volatile("pushl %0\n"
-                 "jmp switch_to\n" ::"r"(proc)
-                 : "memory"); // kernel/asm/x86/interrupt.S
+    intc_notify_eos(0);
+    switch_context(proc);
 }
 
 int
@@ -139,7 +112,7 @@ check_sleepers()
 {
     struct proc_info* leader = sched_ctx._procs[0];
     struct proc_info *pos, *n;
-    time_t now = clock_systime();
+    time_t now = clock_systime() / 1000;
     llist_for_each(pos, n, &leader->sleep.sleepers, sleep.sleepers)
     {
         if (proc_terminated(pos)) {
@@ -209,7 +182,7 @@ void
 sched_yieldk()
 {
     cpu_enable_interrupt();
-    cpu_int(LUNAIX_SCHED);
+    cpu_trap_sched();
 }
 
 __DEFINE_LXSYSCALL1(unsigned int, sleep, unsigned int, seconds)
@@ -218,12 +191,14 @@ __DEFINE_LXSYSCALL1(unsigned int, sleep, unsigned int, seconds)
         return 0;
     }
 
+    time_t systime = clock_systime() / 1000;
+
     if (__current->sleep.wakeup_time) {
-        return (__current->sleep.wakeup_time - clock_systime()) / 1000U;
+        return (__current->sleep.wakeup_time - systime);
     }
 
     struct proc_info* root_proc = sched_ctx._procs[0];
-    __current->sleep.wakeup_time = clock_systime() + seconds * 1000;
+    __current->sleep.wakeup_time = systime + seconds;
 
     if (llist_empty(&__current->sleep.sleepers)) {
         llist_append(&root_proc->sleep.sleepers, &__current->sleep.sleepers);
@@ -240,16 +215,16 @@ __DEFINE_LXSYSCALL1(unsigned int, sleep, unsigned int, seconds)
 __DEFINE_LXSYSCALL1(unsigned int, alarm, unsigned int, seconds)
 {
     time_t prev_ddl = __current->sleep.alarm_time;
-    time_t now = clock_systime();
+    time_t now = clock_systime() / 1000;
 
-    __current->sleep.alarm_time = seconds ? now + seconds * 1000 : 0;
+    __current->sleep.alarm_time = seconds ? now + seconds : 0;
 
     struct proc_info* root_proc = sched_ctx._procs[0];
     if (llist_empty(&__current->sleep.sleepers)) {
         llist_append(&root_proc->sleep.sleepers, &__current->sleep.sleepers);
     }
 
-    return prev_ddl ? (prev_ddl - now) / 1000 : 0;
+    return prev_ddl ? (prev_ddl - now) : 0;
 }
 
 __DEFINE_LXSYSCALL1(void, exit, int, status)
@@ -349,6 +324,8 @@ alloc_process()
     llist_init_head(&proc->children);
     llist_init_head(&proc->grp_member);
     llist_init_head(&proc->sleep.sleepers);
+
+    iopoll_init(&proc->pollctx);
     waitq_init(&proc->waitqueue);
 
     sched_ctx._procs[i] = proc;
@@ -398,6 +375,8 @@ destroy_process(pid_t pid)
     llist_delete(&proc->tasks);
     llist_delete(&proc->sleep.sleepers);
 
+    iopoll_free(pid, &proc->pollctx);
+
     taskfs_invalidate(pid);
 
     if (proc->cwd) {