C API function type #557

gumb0 · 2020-09-28T14:47:28Z

No description provided.

codecov · 2020-09-28T15:05:56Z

Codecov Report

Merging #557 into master will decrease coverage by 0.00%.
The diff coverage is 96.82%.

@@            Coverage Diff             @@
##           master     #557      +/-   ##
==========================================
- Coverage   98.26%   98.26%   -0.01%     
==========================================
  Files          63       63              
  Lines        9238     9282      +44     
==========================================
+ Hits         9078     9121      +43     
- Misses        160      161       +1

gumb0 · 2020-09-30T11:52:10Z

lib/fizzy/capi.cpp

+
+inline fizzy::FuncType unwrap(const FizzyFunctionType& type)
+{
+    fizzy::FuncType func_type{std::vector<fizzy::ValType>(type.inputs_size),


We could optimize it later on the C++ side to not require vector allocation to pass function type (i.e. replace vector with span in fizzy::FuncType)

gumb0 · 2020-10-13T10:21:19Z

lib/fizzy/capi.cpp

@@ -108,25 +145,20 @@ void fizzy_free_module(const FizzyModule* module)
    delete unwrap(module);
 }

+FizzyFunctionType fizzy_get_function_type(const FizzyModule* module, uint32_t func_idx)
+{
+    return wrap(unwrap(module)->get_function_type(func_idx));


Note: get_function_type returns reference to fizzy::FuncType stored in module, then wrap returns pointers to its vector's data.

gumb0 · 2020-10-13T15:04:43Z

static const
The global const means static const in C++, but not in C. This will make them equal.

This will create their copies in each translation unit that includes fizzy.h, is this what we want?

chfast · 2020-10-13T15:17:26Z

This will create their copies in each translation unit that includes fizzy.h, is this what we want?

They are going to be used as compile-time constants, unlikely to be emitted at all.

axic · 2020-10-14T09:06:17Z

@gumb0 can you please rebase and squash?

gumb0 · 2020-10-14T10:13:42Z

@gumb0 can you please rebase and squash?

Done, squashed the last commit.

chfast · 2020-10-14T11:07:00Z

include/fizzy/fizzy.h

+    /// Input types array size.
+    size_t inputs_size;
+    /// Pointer to output types array.
+    const FizzyValueType* outputs;


This is ok, but also can be greatly simplified by defining FizzyValueTypeVoid and using FizzyValueType output_type.

Good idea, I'll try it.

Move it to the front.

gumb0 · 2020-10-14T11:42:21Z

include/fizzy/fizzy.h

+static const FizzyValueType FizzyValueTypeF32 = 0x7d;
+static const FizzyValueType FizzyValueTypeF64 = 0x7c;
+/// Special value, can be used only as function outuput type.
+static const FizzyValueType FizzyValueTypeVoid = 0;


Defining it as 0 allows user to create void type with no params as {}, at least in C++, probably in C, too.

axic · 2020-10-14T16:22:31Z

include/fizzy/fizzy.h

+/// Function type.
+typedef struct FizzyFunctionType
+{
+    /// Output type, can be FizzyValueTypeVoid, if function has no output.


Suggested change

/// Output type, can be FizzyValueTypeVoid, if function has no output.

/// Output type, equals to FizzyValueTypeVoid, if function has no output.

axic · 2020-10-14T16:23:04Z

include/fizzy/fizzy.h

+///                 defined in module.
+///
+/// @note All module function indices are greater than all imported function indices.
+FizzyFunctionType fizzy_get_function_type(const FizzyModule* module, uint32_t func_idx);


What happens on invalid index?

Added a sentence.

axic · 2020-10-14T16:24:20Z

Needs rebase.

gumb0 · 2020-10-14T16:38:41Z

Rebased.

axic · 2020-10-14T16:54:10Z

include/fizzy/fizzy.h

+///
+/// @param module   Pointer to module.
+/// @param func_idx Function index. Can be either index of an imported function or of a function
+///                 defined in module. Behaviour is undefined, index is not valid according to


Suggested change

/// defined in module. Behaviour is undefined, index is not valid according to

/// defined in module. Behaviour is undefined if index is not valid according to

axic

Looks okayish to me.

gumb0 force-pushed the capi_func_type branch 3 times, most recently from 5cd07b1 to 9c3ee98 Compare September 28, 2020 14:54

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gumb0 mentioned this pull request Sep 29, 2020

Public C API #558

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49 tasks

axic added this to In progress in 0.6.0 Sep 29, 2020

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capi: Add FizzyFunctionType and fizzy_get_function_type

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C API function type #557

C API function type #557

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	/// Output type, can be FizzyValueTypeVoid, if function has no output.
	/// Output type, equals to FizzyValueTypeVoid, if function has no output.

	/// defined in module. Behaviour is undefined, index is not valid according to
	/// defined in module. Behaviour is undefined if index is not valid according to

C API function type #557

C API function type #557

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