- ;; unbound_marker is borrowed very briefly at thread startup to
- ;; pass the address of initial-function into new_thread_trampoline
- (unbound-marker :init :unbound) ; tls[0] = UNBOUND_MARKER_WIDETAG
- (binding-stack-start :c-type "lispobj *")
- (binding-stack-pointer :c-type "lispobj *")
- (control-stack-start :c-type "lispobj *")
- (control-stack-end :c-type "lispobj *")
- (alien-stack-start :c-type "lispobj *")
- (alien-stack-pointer :c-type "lispobj *")
- (alloc-region :c-type "struct alloc_region" :length 5)
- (pid :c-type "pid_t")
- (tls-cookie) ; on x86, the LDT index
- (this :c-type "struct thread *")
- (next :c-type "struct thread *")
- (pseudo-atomic-atomic)
- (pseudo-atomic-interrupted)
- (interrupt-data :c-type "struct interrupt_data *")
+ ;; no_tls_value_marker is borrowed very briefly at thread startup to
+ ;; pass the address of initial-function into new_thread_trampoline.
+ ;; tls[0] = NO_TLS_VALUE_MARKER_WIDETAG because a the tls index slot
+ ;; of a symbol is initialized to zero
+ (no-tls-value-marker)
+ (os-thread :c-type "volatile os_thread_t")
+ ;; This is the original address at which the memory was allocated,
+ ;; which may have different alignment then what we prefer to use.
+ ;; Kept here so that when the thread dies we can releast the whole
+ ;; memory we reserved.
+ (os-address :c-type "void *" :length #!+alpha 2 #!-alpha 1)
+ (binding-stack-start :c-type "lispobj *" :length #!+alpha 2 #!-alpha 1)
+ (binding-stack-pointer :c-type "lispobj *" :length #!+alpha 2 #!-alpha 1)
+ (control-stack-start :c-type "lispobj *" :length #!+alpha 2 #!-alpha 1)
+ (control-stack-end :c-type "lispobj *" :length #!+alpha 2 #!-alpha 1)
+ (alien-stack-start :c-type "lispobj *" :length #!+alpha 2 #!-alpha 1)
+ (alien-stack-pointer :c-type "lispobj *" :length #!+alpha 2 #!-alpha 1)
+ #!+gencgc (alloc-region :c-type "struct alloc_region" :length 5)
+ (this :c-type "struct thread *" :length #!+alpha 2 #!-alpha 1)
+ (prev :c-type "struct thread *" :length #!+alpha 2 #!-alpha 1)
+ (next :c-type "struct thread *" :length #!+alpha 2 #!-alpha 1)
+ ;; starting, running, suspended, dead
+ (state :c-type "volatile lispobj")
+ (tls-cookie) ; on x86, the LDT index
+ #!+(or x86 x86-64) (pseudo-atomic-bits)
+ (interrupt-data :c-type "struct interrupt_data *"
+ :length #!+alpha 2 #!-alpha 1)
+ (stepping)