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PCRE2: optimize memory allocations #15395

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4 changes: 4 additions & 0 deletions src/crystal/system/thread.cr
Original file line number Diff line number Diff line change
Expand Up @@ -220,12 +220,16 @@ class Thread
rescue ex
@exception = ex
ensure
run_destructors
Thread.threads.delete(self)
Fiber.inactive(fiber)
detach { system_close }
end
end

protected def run_destructors : Nil
end
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todo: cleanup before merge (not needed anymore).


protected def name=(@name : String)
self.system_name = name
end
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33 changes: 33 additions & 0 deletions src/crystal/system/thread_local.cr
Original file line number Diff line number Diff line change
@@ -0,0 +1,33 @@
class Thread
struct Local(T)
# def initialize
# {% raise "T must be a Reference or Pointer" unless T < Reference || T < Pointer %}
# end

# def initialize(&destructor : Proc(T, Nil))
# {% raise "T must be a Reference or Pointer" unless T < Reference || T < Pointer %}
# end
Comment on lines +3 to +9
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@Sija Sija Mar 15, 2025

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Perhaps these could be uncommented and then called via super in descendant classes to avoid duplicating the code?

Suggested change
# def initialize
# {% raise "T must be a Reference or Pointer" unless T < Reference || T < Pointer %}
# end
# def initialize(&destructor : Proc(T, Nil))
# {% raise "T must be a Reference or Pointer" unless T < Reference || T < Pointer %}
# end
def initialize
{% raise "T must be a Reference or Pointer" unless T < Reference || T < Pointer %}
end
def initialize(&destructor : Proc(T, Nil))
initialize
end


def get : T
get? || raise KeyError.new
end
Comment on lines +11 to +13
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thought: I'm wondering if this overload even makes any sense. Usually, you would probably use the get(&) variant. Or maybe get?. But get() doesn't seem very useful. I'd leave it out unless there's a clear use case. (We can add it later if it becomes necessary)


def get(& : -> T) : T
get? || set(yield)
end

# def get? : T?

# def set(value : T) : T
end
end

{% if flag?(:wasi) %}
require "./wasi/thread_local"
{% elsif flag?(:unix) %}
require "./unix/thread_local"
{% elsif flag?(:win32) %}
require "./win32/thread_local"
{% else %}
{% raise "Thread not supported" %}
{% end %}
30 changes: 30 additions & 0 deletions src/crystal/system/unix/thread_local.cr
Original file line number Diff line number Diff line change
@@ -0,0 +1,30 @@
require "c/pthread"

class Thread
struct Local(T)
@key : LibC::PthreadKeyT

def initialize
{% raise "T must be a Reference or Pointer" unless T < Reference || T < Pointer %}
err = LibC.pthread_key_create(out @key, nil)
raise RuntimeError.from_os_error("pthread_key_create", Errno.new(err)) unless err == 0
end

def initialize(&destructor : Proc(T, Nil))
{% raise "T must be a Reference or Pointer" unless T < Reference || T < Pointer %}
err = LibC.pthread_key_create(out @key, destructor.unsafe_as(Proc(Void*, Nil)))
raise RuntimeError.from_os_error("pthread_key_create", Errno.new(err)) unless err == 0
end

def get? : T?
pointer = LibC.pthread_getspecific(@key)
pointer.as(T) if pointer
end

def set(value : T) : T
err = LibC.pthread_setspecific(@key, value.as(Void*))
raise RuntimeError.from_os_error("pthread_setspecific", Errno.new(err)) unless err == 0
value
end
end
end
21 changes: 21 additions & 0 deletions src/crystal/system/wasi/thread_local.cr
Original file line number Diff line number Diff line change
@@ -0,0 +1,21 @@
class Thread
struct Local(T)
@value : T?

def initialize
{% raise "T must be a Reference or Pointer" unless T < Reference || T < Pointer %}
end

def initialize(&destructor : T ->)
{% raise "T must be a Reference or Pointer" unless T < Reference || T < Pointer %}
end

def get? : T?
@value
end

def set(value : T) : T
@value = value
end
end
end
30 changes: 30 additions & 0 deletions src/crystal/system/win32/thread_local.cr
Original file line number Diff line number Diff line change
@@ -0,0 +1,30 @@
require "c/fibersapi"

class Thread
struct Local(T)
@key : LibC::DWORD

def initialize
{% raise "T must be a Reference or Pointer" unless T < Reference || T < Pointer %}
@key = LibC.FlsAlloc
raise RuntimeError.from_winerror("FlsAlloc: out of indexes") if @key == LibC::FLS_OUT_OF_INDEXES
end

def initialize(&destructor : Proc(T, Nil))
{% raise "T must be a Reference or Pointer" unless T < Reference || T < Pointer %}
@key = LibC.FlsAlloc(destructor.unsafe_as(Proc(Void*, Nil)))
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@straight-shoota straight-shoota Mar 13, 2025

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Suggested change
@key = LibC.FlsAlloc(destructor.unsafe_as(Proc(Void*, Nil)))
@key = LibC.FlsAlloc(destructor.pointer.as(LibC::FLS_CALLBACK_FUNCTION))

raise RuntimeError.from_winerror("FlsAlloc: out of indexes") if @key == LibC::FLS_OUT_OF_INDEXES
end

def get? : T?
pointer = LibC.FlsGetValue(@key)
pointer.as(T) if pointer
end

def set(value : T) : T
ret = LibC.FlsSetValue(@key, value.as(Void*))
raise RuntimeError.from_winerror("FlsSetValue") if ret == 0
value
end
end
end
1 change: 1 addition & 0 deletions src/lib_c/aarch64-android/c/pthread.cr
Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,7 @@ lib LibC
fun pthread_getspecific(__key : PthreadKeyT) : Void*
fun pthread_join(__pthread : PthreadT, __return_value_ptr : Void**) : Int
fun pthread_key_create(__key_ptr : PthreadKeyT*, __key_destructor : Void* ->) : Int
fun pthread_key_delete(__key_ptr : PthreadKeyT) : Int

fun pthread_mutexattr_destroy(__attr : PthreadMutexattrT*) : Int
fun pthread_mutexattr_init(__attr : PthreadMutexattrT*) : Int
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5 changes: 5 additions & 0 deletions src/lib_c/aarch64-darwin/c/pthread.cr
Original file line number Diff line number Diff line change
Expand Up @@ -13,9 +13,13 @@ lib LibC
fun pthread_cond_wait(x0 : PthreadCondT*, x1 : PthreadMutexT*) : Int
fun pthread_create(x0 : PthreadT*, x1 : PthreadAttrT*, x2 : Void* -> Void*, x3 : Void*) : Int
fun pthread_detach(x0 : PthreadT) : Int
fun pthread_getspecific(PthreadKeyT) : Void*
fun pthread_get_stackaddr_np(x0 : PthreadT) : Void*
fun pthread_get_stacksize_np(x0 : PthreadT) : SizeT
fun pthread_join(x0 : PthreadT, x1 : Void**) : Int
alias PthreadKeyDestructor = (Void*) ->
fun pthread_key_create(PthreadKeyT*, PthreadKeyDestructor) : Int
fun pthread_key_delete(PthreadKeyT) : Int
fun pthread_mutexattr_destroy(x0 : PthreadMutexattrT*) : Int
fun pthread_mutexattr_init(x0 : PthreadMutexattrT*) : Int
fun pthread_mutexattr_settype(x0 : PthreadMutexattrT*, x1 : Int) : Int
Expand All @@ -26,4 +30,5 @@ lib LibC
fun pthread_mutex_unlock(x0 : PthreadMutexT*) : Int
fun pthread_self : PthreadT
fun pthread_setname_np(Char*) : Int
fun pthread_setspecific(PthreadKeyT, Void*) : Int
end
1 change: 1 addition & 0 deletions src/lib_c/aarch64-darwin/c/sys/types.cr
Original file line number Diff line number Diff line change
Expand Up @@ -40,6 +40,7 @@ lib LibC
end

type PthreadT = Void*
alias PthreadKeyT = UInt
alias SSizeT = Long
alias SusecondsT = Int
alias TimeT = Long
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5 changes: 5 additions & 0 deletions src/lib_c/aarch64-linux-gnu/c/pthread.cr
Original file line number Diff line number Diff line change
Expand Up @@ -25,8 +25,12 @@ lib LibC
fun pthread_create(newthread : PthreadT*, attr : PthreadAttrT*, start_routine : Void* -> Void*, arg : Void*) : Int
fun pthread_detach(th : PthreadT) : Int
fun pthread_getattr_np(thread : PthreadT, attr : PthreadAttrT*) : Int
fun pthread_getspecific(PthreadKeyT) : Void*
fun pthread_equal(thread1 : PthreadT, thread2 : PthreadT) : Int
fun pthread_join(th : PthreadT, thread_return : Void**) : Int
alias PthreadKeyDestructor = (Void*) ->
fun pthread_key_create(PthreadKeyT*, PthreadKeyDestructor) : Int
fun pthread_key_delete(PthreadKeyT) : Int
fun pthread_mutexattr_destroy(attr : PthreadMutexattrT*) : Int
fun pthread_mutexattr_init(attr : PthreadMutexattrT*) : Int
fun pthread_mutexattr_settype(attr : PthreadMutexattrT*, type : Int) : Int
Expand All @@ -37,4 +41,5 @@ lib LibC
fun pthread_mutex_unlock(mutex : PthreadMutexT*) : Int
fun pthread_self : PthreadT
fun pthread_setname_np(PthreadT, Char*) : Int
fun pthread_setspecific(PthreadKeyT, Void*) : Int
end
1 change: 1 addition & 0 deletions src/lib_c/aarch64-linux-gnu/c/sys/types.cr
Original file line number Diff line number Diff line change
Expand Up @@ -41,6 +41,7 @@ lib LibC
end

alias PthreadT = ULong
alias PthreadKeyT = UInt
alias SSizeT = Long
alias SusecondsT = Long
alias TimeT = Long
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5 changes: 5 additions & 0 deletions src/lib_c/aarch64-linux-musl/c/pthread.cr
Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,11 @@ lib LibC
fun pthread_create(x0 : PthreadT*, x1 : PthreadAttrT*, x2 : Void* -> Void*, x3 : Void*) : Int
fun pthread_detach(x0 : PthreadT) : Int
fun pthread_getattr_np(x0 : PthreadT, x1 : PthreadAttrT*) : Int
fun pthread_getspecific(PthreadKeyT) : Void*
fun pthread_join(x0 : PthreadT, x1 : Void**) : Int
alias PthreadKeyDestructor = (Void*) ->
fun pthread_key_create(PthreadKeyT*, PthreadKeyDestructor) : Int
fun pthread_key_delete(PthreadKeyT) : Int
fun pthread_mutexattr_destroy(x0 : PthreadMutexattrT*) : Int
fun pthread_mutexattr_init(x0 : PthreadMutexattrT*) : Int
fun pthread_mutexattr_settype(x0 : PthreadMutexattrT*, x1 : Int) : Int
Expand All @@ -28,4 +32,5 @@ lib LibC
fun pthread_mutex_unlock(x0 : PthreadMutexT*) : Int
fun pthread_self : PthreadT
fun pthread_setname_np(PthreadT, Char*) : Int
fun pthread_setspecific(PthreadKeyT, Void*) : Int
end
1 change: 1 addition & 0 deletions src/lib_c/aarch64-linux-musl/c/sys/types.cr
Original file line number Diff line number Diff line change
Expand Up @@ -54,6 +54,7 @@ lib LibC
end

type PthreadT = Void*
alias PthreadKeyT = UInt
alias SSizeT = Long
alias SusecondsT = Long
alias TimeT = Long
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5 changes: 5 additions & 0 deletions src/lib_c/arm-linux-gnueabihf/c/pthread.cr
Original file line number Diff line number Diff line change
Expand Up @@ -25,8 +25,12 @@ lib LibC
fun pthread_create(newthread : PthreadT*, attr : PthreadAttrT*, start_routine : Void* -> Void*, arg : Void*) : Int
fun pthread_detach(th : PthreadT) : Int
fun pthread_getattr_np(thread : PthreadT, attr : PthreadAttrT*) : Int
fun pthread_getspecific(PthreadKeyT) : Void*
fun pthread_equal(thread1 : PthreadT, thread2 : PthreadT) : Int
fun pthread_join(th : PthreadT, thread_return : Void**) : Int
alias PthreadKeyDestructor = (Void*) ->
fun pthread_key_create(PthreadKeyT*, PthreadKeyDestructor) : Int
fun pthread_key_delete(PthreadKeyT) : Int
fun pthread_mutexattr_destroy(attr : PthreadMutexattrT*) : Int
fun pthread_mutexattr_init(attr : PthreadMutexattrT*) : Int
fun pthread_mutexattr_settype(attr : PthreadMutexattrT*, type : Int) : Int
Expand All @@ -37,4 +41,5 @@ lib LibC
fun pthread_mutex_unlock(mutex : PthreadMutexT*) : Int
fun pthread_self : PthreadT
fun pthread_setname_np(PthreadT, Char*) : Int
fun pthread_setspecific(PthreadKeyT, Void*) : Int
end
1 change: 1 addition & 0 deletions src/lib_c/arm-linux-gnueabihf/c/sys/types.cr
Original file line number Diff line number Diff line change
Expand Up @@ -54,6 +54,7 @@ lib LibC
end

alias PthreadT = ULong
alias PthreadKeyT = UInt
alias SSizeT = Int
alias SusecondsT = Long
alias TimeT = Long
Expand Down
5 changes: 5 additions & 0 deletions src/lib_c/i386-linux-gnu/c/pthread.cr
Original file line number Diff line number Diff line change
Expand Up @@ -25,7 +25,11 @@ lib LibC
fun pthread_create(newthread : PthreadT*, attr : PthreadAttrT*, start_routine : Void* -> Void*, arg : Void*) : Int
fun pthread_detach(th : PthreadT) : Int
fun pthread_getattr_np(thread : PthreadT, attr : PthreadAttrT*) : Int
fun pthread_getspecific(PthreadKeyT) : Void*
fun pthread_join(th : PthreadT, thread_return : Void**) : Int
alias PthreadKeyDestructor = (Void*) ->
fun pthread_key_create(PthreadKeyT*, PthreadKeyDestructor) : Int
fun pthread_key_delete(PthreadKeyT) : Int
fun pthread_mutexattr_destroy(attr : PthreadMutexattrT*) : Int
fun pthread_mutexattr_init(attr : PthreadMutexattrT*) : Int
fun pthread_mutexattr_settype(attr : PthreadMutexattrT*, type : Int) : Int
Expand All @@ -36,4 +40,5 @@ lib LibC
fun pthread_mutex_unlock(mutex : PthreadMutexT*) : Int
fun pthread_self : PthreadT
fun pthread_setname_np(PthreadT, Char*) : Int
fun pthread_setspecific(PthreadKeyT, Void*) : Int
end
1 change: 1 addition & 0 deletions src/lib_c/i386-linux-gnu/c/sys/types.cr
Original file line number Diff line number Diff line change
Expand Up @@ -41,6 +41,7 @@ lib LibC
end

alias PthreadT = ULong
alias PthreadKeyT = UInt
alias SSizeT = Int
alias SusecondsT = Long
alias TimeT = Long
Expand Down
5 changes: 5 additions & 0 deletions src/lib_c/i386-linux-musl/c/pthread.cr
Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,11 @@ lib LibC
fun pthread_create(x0 : PthreadT*, x1 : PthreadAttrT*, x2 : Void* -> Void*, x3 : Void*) : Int
fun pthread_detach(x0 : PthreadT) : Int
fun pthread_getattr_np(x0 : PthreadT, x1 : PthreadAttrT*) : Int
fun pthread_getspecific(PthreadKeyT) : Void*
fun pthread_join(x0 : PthreadT, x1 : Void**) : Int
alias PthreadKeyDestructor = (Void*) ->
fun pthread_key_create(PthreadKeyT*, PthreadKeyDestructor) : Int
fun pthread_key_delete(PthreadKeyT) : Int
fun pthread_mutexattr_destroy(x0 : PthreadMutexattrT*) : Int
fun pthread_mutexattr_init(x0 : PthreadMutexattrT*) : Int
fun pthread_mutexattr_settype(x0 : PthreadMutexattrT*, x1 : Int) : Int
Expand All @@ -28,4 +32,5 @@ lib LibC
fun pthread_mutex_unlock(x0 : PthreadMutexT*) : Int
fun pthread_self : PthreadT
fun pthread_setname_np(PthreadT, Char*) : Int
fun pthread_setspecific(PthreadKeyT, Void*) : Int
end
1 change: 1 addition & 0 deletions src/lib_c/i386-linux-musl/c/sys/types.cr
Original file line number Diff line number Diff line change
Expand Up @@ -54,6 +54,7 @@ lib LibC
end

type PthreadT = Void*
alias PthreadKeyT = UInt
alias SSizeT = Int
alias SusecondsT = Long
alias TimeT = Long
Expand Down
5 changes: 5 additions & 0 deletions src/lib_c/x86_64-darwin/c/pthread.cr
Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,11 @@ lib LibC
fun pthread_detach(x0 : PthreadT) : Int
fun pthread_get_stackaddr_np(x0 : PthreadT) : Void*
fun pthread_get_stacksize_np(x0 : PthreadT) : SizeT
fun pthread_getspecific(PthreadKeyT) : Void*
fun pthread_join(x0 : PthreadT, x1 : Void**) : Int
alias PthreadKeyDestructor = (Void*) ->
fun pthread_key_create(PthreadKeyT*, PthreadKeyDestructor) : Int
fun pthread_key_delete(PthreadKeyT) : Int
fun pthread_mutexattr_destroy(x0 : PthreadMutexattrT*) : Int
fun pthread_mutexattr_init(x0 : PthreadMutexattrT*) : Int
fun pthread_mutexattr_settype(x0 : PthreadMutexattrT*, x1 : Int) : Int
Expand All @@ -26,4 +30,5 @@ lib LibC
fun pthread_mutex_unlock(x0 : PthreadMutexT*) : Int
fun pthread_self : PthreadT
fun pthread_setname_np(Char*) : Int
fun pthread_setspecific(PthreadKeyT, Void*) : Int
end
1 change: 1 addition & 0 deletions src/lib_c/x86_64-darwin/c/sys/types.cr
Original file line number Diff line number Diff line change
Expand Up @@ -40,6 +40,7 @@ lib LibC
end

type PthreadT = Void*
alias PthreadKeyT = UInt
alias SSizeT = Long
alias SusecondsT = Int
alias TimeT = Long
Expand Down
5 changes: 5 additions & 0 deletions src/lib_c/x86_64-dragonfly/c/pthread.cr
Original file line number Diff line number Diff line change
Expand Up @@ -19,7 +19,11 @@ lib LibC
fun pthread_cond_wait(x0 : PthreadCondT*, x1 : PthreadMutexT*) : Int
fun pthread_create(x0 : PthreadT*, x1 : PthreadAttrT*, x2 : Void* -> Void*, x3 : Void*) : Int
fun pthread_detach(x0 : PthreadT) : Int
fun pthread_getspecific(PthreadKeyT) : Void*
fun pthread_join(x0 : PthreadT, x1 : Void**) : Int
alias PthreadKeyDestructor = (Void*) ->
fun pthread_key_create(PthreadKeyT*, PthreadKeyDestructor) : Int
fun pthread_key_delete(PthreadKeyT) : Int
fun pthread_mutexattr_destroy(x0 : PthreadMutexattrT*) : Int
fun pthread_mutexattr_init(x0 : PthreadMutexattrT*) : Int
fun pthread_mutexattr_settype(x0 : PthreadMutexattrT*, x1 : Int) : Int
Expand All @@ -30,4 +34,5 @@ lib LibC
fun pthread_mutex_unlock(x0 : PthreadMutexT*) : Int
fun pthread_self : PthreadT
fun pthread_setname_np(PthreadT, Char*) : Int
fun pthread_setspecific(PthreadKeyT, Void*) : Int
end
1 change: 1 addition & 0 deletions src/lib_c/x86_64-dragonfly/c/sys/types.cr
Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,7 @@ lib LibC
type PthreadAttrT = Void*
type PthreadCondT = Void*
type PthreadCondattrT = Void*
alias PthreadKeyT = Int
type PthreadMutexT = Void*
type PthreadMutexattrT = Void*
type PthreadT = Void*
Expand Down
5 changes: 5 additions & 0 deletions src/lib_c/x86_64-freebsd/c/pthread.cr
Original file line number Diff line number Diff line change
Expand Up @@ -19,7 +19,11 @@ lib LibC
fun pthread_cond_wait(x0 : PthreadCondT*, x1 : PthreadMutexT*) : Int
fun pthread_create(x0 : PthreadT*, x1 : PthreadAttrT*, x2 : Void* -> Void*, x3 : Void*) : Int
fun pthread_detach(x0 : PthreadT) : Int
fun pthread_getspecific(PthreadKeyT) : Void*
fun pthread_join(x0 : PthreadT, x1 : Void**) : Int
alias PthreadKeyDestructor = (Void*) ->
fun pthread_key_create(PthreadKeyT*, PthreadKeyDestructor) : Int
fun pthread_key_delete(PthreadKeyT) : Int
fun pthread_mutexattr_destroy(x0 : PthreadMutexattrT*) : Int
fun pthread_mutexattr_init(x0 : PthreadMutexattrT*) : Int
fun pthread_mutexattr_settype(x0 : PthreadMutexattrT*, x1 : Int) : Int
Expand All @@ -30,4 +34,5 @@ lib LibC
fun pthread_mutex_unlock(x0 : PthreadMutexT*) : Int
fun pthread_self : PthreadT
fun pthread_set_name_np(PthreadT, Char*)
fun pthread_setspecific(PthreadKeyT, Void*) : Int
end
1 change: 1 addition & 0 deletions src/lib_c/x86_64-freebsd/c/sys/types.cr
Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,7 @@ lib LibC
type PthreadAttrT = Void*
type PthreadCondT = Void*
type PthreadCondattrT = Void*
alias PthreadKeyT = Int
type PthreadMutexT = Void*
type PthreadMutexattrT = Void*
type PthreadT = Void*
Expand Down
5 changes: 5 additions & 0 deletions src/lib_c/x86_64-linux-gnu/c/pthread.cr
Original file line number Diff line number Diff line change
Expand Up @@ -25,7 +25,11 @@ lib LibC
fun pthread_create(newthread : PthreadT*, attr : PthreadAttrT*, start_routine : Void* -> Void*, arg : Void*) : Int
fun pthread_detach(th : PthreadT) : Int
fun pthread_getattr_np(thread : PthreadT, attr : PthreadAttrT*) : Int
fun pthread_getspecific(PthreadKeyT) : Void*
fun pthread_join(th : PthreadT, thread_return : Void**) : Int
alias PthreadKeyDestructor = (Void*) ->
fun pthread_key_create(PthreadKeyT*, PthreadKeyDestructor) : Int
fun pthread_key_delete(PthreadKeyT) : Int
fun pthread_mutexattr_destroy(attr : PthreadMutexattrT*) : Int
fun pthread_mutexattr_init(attr : PthreadMutexattrT*) : Int
fun pthread_mutexattr_settype(attr : PthreadMutexattrT*, type : Int) : Int
Expand All @@ -36,4 +40,5 @@ lib LibC
fun pthread_mutex_unlock(mutex : PthreadMutexT*) : Int
fun pthread_self : PthreadT
fun pthread_setname_np(PthreadT, Char*) : Int
fun pthread_setspecific(PthreadKeyT, Void*) : Int
end
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