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kernel: finish implementation of private and shared futexes

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max 🍓
2026-03-18 20:57:51 +00:00
parent b774415f64
commit 2a1a0cf14d
10 changed files with 254 additions and 29 deletions
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18
include/kernel/futex.h
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@@ -5,22 +5,30 @@
#include <kernel/wait.h>
#include <mango/types.h>
struct task;
struct address_space;
typedef phys_addr_t futex_key_t;
typedef uintptr_t futex_key_t;
struct futex {
struct btree_node f_node;
futex_key_t f_key;
struct waitqueue f_waiters;
};
extern kern_status_t futex_init(void);
extern kern_status_t futex_get(
struct address_space *space,
kern_futex_t *futex,
futex_key_t *out);
extern kern_status_t futex_wait(futex_key_t futex, kern_futex_t new_val);
extern kern_status_t futex_wake(futex_key_t futex, size_t nwaiters);
futex_key_t *out,
unsigned int flags);
extern kern_status_t futex_wait(
futex_key_t futex,
kern_futex_t new_val,
unsigned int flags);
extern kern_status_t futex_wake(
futex_key_t futex,
size_t nwaiters,
unsigned int flags);
#endif

9
include/kernel/syscall.h
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@@ -197,6 +197,15 @@ extern kern_status_t sys_vm_controller_supply_pages(
off_t src_offset,
size_t count);
extern kern_status_t sys_futex_wait(
kern_futex_t *futex,
kern_futex_t new_val,
unsigned int flags);
extern kern_status_t sys_futex_wake(
kern_futex_t *futex,
unsigned int nr_waiters,
unsigned int flags);
extern virt_addr_t syscall_get_function(unsigned int sysid);
#endif

2
include/kernel/task.h
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@@ -27,7 +27,7 @@ struct task {
struct address_space *t_address_space;
spin_lock_t t_handles_lock;
struct handle_table *t_handles;
struct btree b_channels;
struct btree t_channels, t_futex;
struct btree_node t_tasklist;
struct queue_entry t_child_entry;