Use disable_sigint instead of sigatomic_(begin|end)

src/PyCall.jl

@@ -24,13 +24,6 @@ if isdefined(Base, :hasproperty) # Julia 1.2
     import Base: hasproperty
 end
 
-# Python C API is not interrupt-safe.  In principle, we should
-# use sigatomic for every ccall to the Python library, but this
-# should really be fixed in Julia (#2622).  However, we will
-# use the sigatomic_begin/end functions to protect pycall and
-# similar long-running (or potentially long-running) code.
-import Base: sigatomic_begin, sigatomic_end
-
 import Conda
 import MacroTools   # because of issue #270
 import Base.Iterators: filter

src/exception.jl

@@ -70,6 +70,18 @@ callsym(s::QuoteNode) = s.value
 import Base.Meta.isexpr
 callsym(ex::Expr) = isexpr(ex,:macrocall,2) ? callsym(ex.args[2]) : isexpr(ex,:ccall) ? callsym(ex.args[1]) : ex
 
+"""
+    _handle_error(msg)
+
+Throw a PyError if available, otherwise throw ErrorException.
+This is a hack to manually do the optimization described in
+https://github.com/JuliaLang/julia/issues/29688
+"""
+@noinline function _handle_error(msg)
+    pyerr_check(msg)
+    error(msg, " failed")
+end
+
 # Macros for common pyerr_check("Foo", ccall((@pysym :Foo), ...)) pattern.
 macro pycheck(ex)
     :(pyerr_check($(string(callsym(ex))), $(esc(ex))))
@@ -80,9 +92,7 @@ macro pycheckv(ex, bad)
     quote
         val = $(esc(ex))
         if val == $(esc(bad))
-            # throw a PyError if available, otherwise throw ErrorException
-            pyerr_check($(string(callsym(ex))))
-            error($(string(callsym(ex))), " failed")
+            _handle_error($(string(callsym(ex))))
         end
         val
     end

src/pyeval.jl

@@ -31,17 +31,15 @@ pynamespace(m::Module) =
 # and a current "file name" to use for stack traces
 function pyeval_(s::AbstractString, globals=pynamespace(Main), locals=pynamespace(Main),
                  input_type=Py_eval_input, fname="PyCall")
-    sigatomic_begin()
-    try
-        o = PyObject(@pycheckn ccall((@pysym :Py_CompileString), PyPtr,
-                                     (Cstring, Cstring, Cint),
-                                     s, fname, input_type))
-        return PyObject(@pycheckn ccall((@pysym :PyEval_EvalCode),
-                                         PyPtr, (PyPtr, PyPtr, PyPtr),
-                                         o, globals, locals))
-    finally
-        sigatomic_end()
+    o = PyObject(@pycheckn ccall((@pysym :Py_CompileString), PyPtr,
+                                 (Cstring, Cstring, Cint),
+                                 s, fname, input_type))
+    ptr = disable_sigint() do
+        @pycheckn ccall((@pysym :PyEval_EvalCode),
+                        PyPtr, (PyPtr, PyPtr, PyPtr),
+                        o, globals, locals)
     end
+    return PyObject(ptr)
 end
 
 """

src/pyfncall.jl

@@ -39,14 +39,11 @@ Sets `ret.o` to the result of the call, and returns `ret::PyObject`.
 """
 function __pycall!(ret::PyObject, pyargsptr::PyPtr, o::Union{PyObject,PyPtr},
   kw::Union{Ptr{Cvoid}, PyObject})
-    sigatomic_begin()
-    try
+    disable_sigint() do
         retptr = @pycheckn ccall((@pysym :PyObject_Call), PyPtr, (PyPtr,PyPtr,PyPtr), o,
                         pyargsptr, kw)
         pydecref_(ret)
         setfield!(ret, :o, retptr)
-    finally
-        sigatomic_end()
     end
     return ret #::PyObject
 end

src/pyiterator.jl

@@ -5,14 +5,11 @@
 
 Base.IteratorSize(::Type{PyObject}) = Base.SizeUnknown()
 function _start(po::PyObject)
-    sigatomic_begin()
-    try
+    disable_sigint() do
         o = PyObject(@pycheckn ccall((@pysym :PyObject_GetIter), PyPtr, (PyPtr,), po))
         nxt = PyObject(@pycheck ccall((@pysym :PyIter_Next), PyPtr, (PyPtr,), o))
 
         return (nxt,o)
-    finally
-        sigatomic_end()
     end
 end
 
@@ -76,12 +73,9 @@ _start(piter::PyIterator) = _start(piter.o)
 
 function Base.iterate(piter::PyIterator{T}, s=_start(piter)) where {T}
     ispynull(s[1]) && return nothing
-    sigatomic_begin()
-    try
+    disable_sigint() do
         nxt = PyObject(@pycheck ccall((@pysym :PyIter_Next), PyPtr, (PyPtr,), s[2]))
         return (convert(T,s[1]), (nxt, s[2]))
-    finally
-        sigatomic_end()
     end
 end
 function Base.iterate(po::PyObject, s=_start(po))