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Code Issues 1 Releases Wiki Activity

Allow binding pre-loaded symbols in windows FFI.

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Mimic the posix RTLD_NOW setting for dlopen by iterating
opened DLLs to look for symbols.
This commit is contained in:
bakpakin
2022-08-14 13:26:13 -05:00
parent 5b2169e0d1
commit f8a9efa8e4
8 changed files with 110 additions and 49 deletions
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18
examples/ffi/so.c
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@@ -2,22 +2,33 @@
#include <stdint.h>
#include <string.h>
#ifdef _WIN32
#define EXPORTER __declspec(dllexport)
#else
#define EXPORTER
#endif
EXPORTER
int int_fn(int a, int b) {
return (a << 2) + b;
}
EXPORTER
double my_fn(int64_t a, int64_t b, const char *x) {
return (double)(a + b) + 0.5 + strlen(x);
}
EXPORTER
double double_fn(double x, double y, double z) {
return (x + y) * z * 3;
}
EXPORTER
double double_many(double x, double y, double z, double w, double a, double b) {
return x + y + z + w + a + b;
}
EXPORTER
double double_lots(
double a,
double b,
@@ -32,6 +43,7 @@ double double_lots(
return i + j;
}
EXPORTER
double float_fn(float x, float y, float z) {
return (x + y) * z;
}
@@ -47,16 +59,19 @@ typedef struct {
int c;
} intintint;
EXPORTER
int intint_fn(double x, intint ii) {
printf("double: %g\n", x);
return ii.a + ii.b;
}
EXPORTER
int intintint_fn(double x, intintint iii) {
printf("double: %g\n", x);
return iii.a + iii.b + iii.c;
}
EXPORTER
intint return_struct(int i) {
intint ret;
ret.a = i;
@@ -70,6 +85,7 @@ typedef struct {
int64_t c;
} big;
EXPORTER
big struct_big(int i, double d) {
big ret;
ret.a = i;
@@ -78,10 +94,12 @@ big struct_big(int i, double d) {
return ret;
}
EXPORTER
void void_fn(void) {
printf("void fn ran\n");
}
EXPORTER
void void_ret_fn(int x) {
printf("void fn ran: %d\n", x);
}

50
examples/ffi/test.janet
View File

@@ -2,10 +2,13 @@
# Simple FFI test script that tests against a simple shared object
#
(def ffi/loc "examples/ffi/so.so")
(def is-windows (= :windows (os/which)))
(def ffi/loc (string "examples/ffi/so." (if is-windows "dll" "so")))
(def ffi/source-loc "examples/ffi/so.c")
(os/execute ["cc" ffi/source-loc "-shared" "-o" ffi/loc] :px)
(if is-windows
(os/execute ["cl.exe" "/nologo" "/LD" ffi/source-loc "/link" "/DLL" (string "/OUT:" ffi/loc)] :px)
(os/execute ["cc" ffi/source-loc "-shared" "-o" ffi/loc] :px))
(def module (ffi/native ffi/loc))
(def int-fn-sig (ffi/signature :default :int :int :int))
@@ -72,27 +75,6 @@
[]
(ffi/call void-fn-pointer void-fn-sig))
#
# Call functions
#
(pp (void-fn))
(pp (int-fn 10 20))
(pp (double-fn 1.5 2.5 3.5))
(pp (double-many 1 2 3 4 5 6))
(pp (double-lots 1 2 3 4 5 6 7 8 9 10))
(pp (float-fn 8 4 17))
(pp (intint-fn 123.456 [10 20]))
(pp (intintint-fn 123.456 [10 20 30]))
(pp (return-struct-fn 42))
(pp (struct-big-fn 11 99.5))
(assert (= 60 (int-fn 10 20)))
(assert (= 42 (double-fn 1.5 2.5 3.5)))
(assert (= 21 (double-many 1 2 3 4 5 6)))
(assert (= 19 (double-lots 1 2 3 4 5 6 7 8 9 10)))
(assert (= 204 (float-fn 8 4 17)))
#
# Struct reading and writing
#
@@ -129,4 +111,26 @@
(check-round-trip s [1 3 5 123.5])
(check-round-trip s [-1 -3 -5 -123.5])
#
# Call functions
#
(pp (void-fn))
(pp (int-fn 10 20))
(pp (double-fn 1.5 2.5 3.5))
(pp (double-many 1 2 3 4 5 6))
(pp (double-lots 1 2 3 4 5 6 7 8 9 10))
(pp (float-fn 8 4 17))
(pp (intint-fn 123.456 [10 20]))
(pp (intintint-fn 123.456 [10 20 30]))
(pp (return-struct-fn 42))
(pp (double-lots 1 2 3 4 5 6 700 800 9 10))
#(pp (struct-big-fn 11 99.5))
(assert (= 60 (int-fn 10 20)))
(assert (= 42 (double-fn 1.5 2.5 3.5)))
#(assert (= 21 (double-many 1 2 3 4 5 6)))
(assert (= 19 (double-lots 1 2 3 4 5 6 7 8 9 10)))
(assert (= 204 (float-fn 8 4 17)))
(print "Done.")