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slab: rewrite slab allocator

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Matheus
2025-09-04 22:40:10 -03:00
parent 8cba07f65c
commit 2fa040096c
11 changed files with 500 additions and 261 deletions
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kernel-src/sys/syscalls/futex.c
+4 -21
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@@ -6,7 +6,6 @@
#include <kernel/poll.h>
#include <kernel/alloc.h>
static scache_t *futexcache;
static mutex_t futexmutex;
static hashtable_t hashtable;
static bool hashtableinit;
@@ -36,29 +35,13 @@ static void removefutex(void *physical) {
hashtable_remove(&hashtable, &physical, sizeof(physical));
}
static void ctor(scache_t *cache, void *obj) {
futex_t *futex = obj;
POLL_INITHEADER(&futex->pollheader);
futex->waiting = 0;
futex->waking = 0;
}
syscallret_t syscall_futex(context_t *, uint32_t *futexp, int op, uint32_t value, timespec_t *tm) {
syscallret_t ret = {
.ret = -1
};
if (futexcache == NULL) {
futexcache = slab_newcache(sizeof(thread_t), 0, ctor, ctor);
if (futexcache == NULL) {
ret.errno = ENOMEM;
return ret;
}
}
if (hashtableinit == false) {
if (hashtable_init(&hashtable, 256)) {
if (unlikely(hashtableinit == false)) {
if (unlikely(hashtable_init(&hashtable, 256))) {
ret.errno = ENOMEM;
return ret;
}
@@ -70,7 +53,7 @@ syscallret_t syscall_futex(context_t *, uint32_t *futexp, int op, uint32_t value
timespec_t timespec = tm ? *tm : (timespec_t){0};
polldesc_t desc = {0};
ret.errno = poll_initdesc(&desc, 1);
if (ret.errno)
if (unlikely(ret.errno))
return ret;
MUTEX_ACQUIRE(&futexmutex);
@@ -78,7 +61,7 @@ syscallret_t syscall_futex(context_t *, uint32_t *futexp, int op, uint32_t value
bool doleave = true;
uint32_t word;
ret.errno = usercopy_fromuseratomic32(futexp, &word);
if (ret.errno)
if (unlikely(ret.errno))
goto cleanup;
uint32_t *physical = vmm_getphysical(futexp, false);