Rewrite resource subsystem

kernel/amd64/proc.c

@@ -1,4 +1,5 @@
 #include <amd64/gdt.h>
+#include <amd64/proc.h>
 #include <aux/elf.h>
 #include <libk/list.h>
 #include <libk/rbtree.h>
@@ -9,13 +10,16 @@
 #include <mm/pmm.h>
 #include <proc/proc.h>
 #include <proc/resource.h>
+#include <sync/rw_spin_lock.h>
 #include <sync/spin_lock.h>
 #include <sys/debug.h>
 
+/* 0 is kpproc */
 static atomic_int pids = 1;
 
 struct proc* proc_from_elf (uint8_t* elf_contents) {
   struct limine_hhdm_response* hhdm = limine_hhdm_request.response;
+  int rid;
 
   struct proc* proc = malloc (sizeof (*proc));
   if (proc == NULL)
@@ -27,51 +31,59 @@ struct proc* proc_from_elf (uint8_t* elf_contents) {
   atomic_store (&proc->state, PROC_READY);
   proc->pid = atomic_fetch_add (&pids, 1);
 
+  proc->resources = malloc (sizeof (*proc->resources));
+  if (proc->resources == NULL) {
+    free (proc);
+    return NULL;
+  }
+  proc->resources->tree = NULL;
+  proc->resources->lock = RW_SPIN_LOCK_INIT;
+  proc->resources->refs = 1;
+  proc->resources->sys_rids = 0;
+
   proc->pd = malloc (sizeof (*proc->pd));
   if (proc->pd == NULL) {
+    free (proc->resources);
     free (proc);
     return NULL;
   }
 
-  proc->sys_rids = malloc (sizeof (*proc->sys_rids));
-  if (proc->sys_rids == NULL) {
-    free (proc);
-    return NULL;
-  }
-  proc->sys_rids->counter = 0;
-  proc->sys_rids->refs = 1;
-
   proc->pd->lock = SPIN_LOCK_INIT;
   proc->pd->refs = 1;
   proc->pd->cr3_paddr = mm_alloc_user_pd_phys ();
   if (proc->pd->cr3_paddr == 0) {
     free (proc->pd);
+    free (proc->resources);
     free (proc);
     return NULL;
   }
 
-  int kstk_rid = atomic_fetch_add (&proc->sys_rids->counter, 1);
-  struct proc_resource_mem_init kstk_mem_init = {.pages = KSTACK_SIZE / PAGE_SIZE};
+  struct proc_resource_mem_init kstk_mem_init = {.pages = KSTACK_SIZE / PAGE_SIZE,
+                                                 .managed = false};
+  rid = atomic_fetch_add (&proc->resources->sys_rids, 1);
   struct proc_resource* kstk_r =
-      proc_create_resource (proc, kstk_rid, PR_MEM, RV_PRIVATE, (void*)&kstk_mem_init);
+      proc_create_resource (proc, rid, PR_MEM, RV_PRIVATE, (void*)&kstk_mem_init);
   if (kstk_r == NULL) {
     pmm_free (proc->pd->cr3_paddr, 1);
     free (proc->pd);
+    free (proc->resources);
     free (proc);
     return NULL;
   }
 
   proc->pdata.kernel_stack = kstk_r->u.mem.paddr + (uintptr_t)hhdm->offset + KSTACK_SIZE;
 
-  int ustk_rid = atomic_fetch_add (&proc->sys_rids->counter, 1);
-  struct proc_resource_mem_init ustk_mem_init = {.pages = USTACK_SIZE / PAGE_SIZE};
+  struct proc_resource_mem_init ustk_mem_init = {.pages = USTACK_SIZE / PAGE_SIZE,
+                                                 .managed = false};
+  rid = atomic_fetch_add (&proc->resources->sys_rids, 1);
   struct proc_resource* ustk_r =
-      proc_create_resource (proc, ustk_rid, PR_MEM, RV_PRIVATE, (void*)&ustk_mem_init);
+      proc_create_resource (proc, rid, PR_MEM, RV_PRIVATE, (void*)&ustk_mem_init);
   if (ustk_r == NULL) {
     kstk_r->ops.cleanup (proc, kstk_r);
     free (kstk_r);
     pmm_free (proc->pd->cr3_paddr, 1);
     free (proc->pd);
+    free (proc->resources);
     free (proc);
     return NULL;
   }
@@ -97,7 +109,8 @@ struct proc* proc_from_elf (uint8_t* elf_contents) {
 struct proc* proc_spawn_thread (struct proc* proto, uintptr_t vstack_top, size_t stack_size,
                                 uintptr_t entry) {
   struct limine_hhdm_response* hhdm = limine_hhdm_request.response;
-  spin_lock_ctx_t ctxprt;
+  spin_lock_ctx_t ctxprt, ctxrs;
+  int rid;
 
   struct proc* proc = malloc (sizeof (*proc));
   if (proc == NULL)
@@ -115,9 +128,26 @@ struct proc* proc_spawn_thread (struct proc* proto, uintptr_t vstack_top, size_t
   proc->mappings = proto->mappings;
   atomic_fetch_add (&proto->pd->refs, 1);
 
-  proc->resource_tree = proto->resource_tree;
-  proc->sys_rids = proto->sys_rids;
-  atomic_fetch_add (&proc->sys_rids->refs, 1);
+  proc->resources = proto->resources;
+
+  rw_spin_write_lock (&proc->resources->lock, &ctxrs);
+
+  atomic_fetch_add (&proc->resources->refs, 1);
+
+  struct rb_node_link* rnode;
+  rbtree_first (&proc->resources->tree, rnode);
+  while (rnode) {
+    struct rb_node_link* next;
+    rbtree_next (rnode, next);
+
+    struct proc_resource* resource =
+        rbtree_entry (rnode, struct proc_resource, local_resource_tree_link);
+    atomic_fetch_add (&resource->refs, 1);
+
+    rnode = next;
+  }
+
+  rw_spin_write_unlock (&proc->resources->lock, &ctxrs);
 
   spin_unlock (&proto->lock, &ctxprt);
 
@@ -129,10 +159,11 @@ struct proc* proc_spawn_thread (struct proc* proto, uintptr_t vstack_top, size_t
     return NULL;
   }
 
-  int kstk_rid = atomic_fetch_add (&proc->sys_rids->counter, 1);
-  struct proc_resource_mem_init kstk_mem_init = {.pages = KSTACK_SIZE / PAGE_SIZE};
+  struct proc_resource_mem_init kstk_mem_init = {.pages = KSTACK_SIZE / PAGE_SIZE,
+                                                 .managed = false};
+  rid = atomic_fetch_add (&proc->resources->sys_rids, 1);
   struct proc_resource* kstk_r =
-      proc_create_resource (proc, kstk_rid, PR_MEM, RV_PRIVATE, (void*)&kstk_mem_init);
+      proc_create_resource (proc, rid, PR_MEM, RV_PRIVATE, (void*)&kstk_mem_init);
   if (kstk_r == NULL) {
     free (proc);
     return NULL;