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< title > mono-api-dynamic-codegen.html< / title >
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< / style >
< / head >
< body >
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< div class = "mapi-docs" >
< h2 > Internal: Dynamic Code Generation< / h2 >
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< p / > The dynamic code generation interface inside the Mono
runtime is similar to the API exposed by
System.Reflection.Emit.
< p / > This interface is used by Mono internally to generate code
on the flight in a cross-platform fashion. For example,
P/Invoke marshalling in Mono is implemented in terms of this
interface, but it is also used in various other parts of the
runtime.
< p / > Unlike Reflection.Emit, the dynamic code generation
interface does not start with an assembly builder. The code
generation interface starts directly at the method level,
which is represented by a pointer to the MonoMethodBuilder
structure.
< p / > To JIT this method, the process is this:
< ul >
< li > Create a < tt > MonoMethodBuilder< / tt > object using
the < tt > mono_mb_new< / tt > method. The method's class
is specified as the first argument.
< li > Create the method signature, using
< tt > mono_metadata_signature_alloc< / tt > . The call
takes the number of arguments that the method takes.
Then you must initialize the types for each one of the
parameters.
< li > Emit the CIL code, using one of the
< tt > mono_mb_emit_*< / tt > functions. There are some
helper routines that you can use.
< li > Create the < tt > MonoMethod< / tt > from the
< tt > MethodBuilder< / tt > using
< tt > mono_mb_create_method< / tt > .
< li > Release the < tt > MonoMethodBuilder< / tt > resources
using mono_mb_free.
< / li > < / li > < / li > < / li > < / li > < / ul >
< p / > The result of this process is a < tt > MonoMethod< / tt > which
can be called using < tt > < a href = "api:mono_create_jit_trampoline" > mono_create_jit_trampoline< / a > < / tt >
routine or can be passed to any other functions that require
the MonoMethod.
< p / > Example:
< pre >
MonoMethod *adder ()
{
MonoMethodBuilder *mb;
MonoMethodSignature *sig;
MonoMethod *method;
mb = mono_mb_new (mono_defaults.object_class, " adder" , MONO_WRAPPER_NONE);
/* Setup method signature */
sig = mono_metadata_signature_alloc (2);
sig-> ret = & mono_get_int32_class ()-> byval_arg;
sig-> params [0] = & mono_get_int32_class ()-> byval_arg;
sig-> params [1] = & mono_defaults.int32_class-> byval_arg;
/* Emit CIL code */
mono_mb_emit_ldarg (mb, 0);
mono_mb_emit_ldarg (mb, 1);
mono_mb_emit_byte (mb, CEE_ADD);
mono_mb_emit_byte (mb, CEE_RET);
/* Get the method */
method = mono_mb_create_method (mb, sig, max_stack);
/* Cleanup */
mono_mb-free (mb);
return method;
}
< / pre >
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< a name = "api:mono_mb_new" > < / a >
< div class = "mapi" >
< div class = "mapi-entry " > < code > mono_mb_new< / code > < / div >
< div class = "mapi-height-container" >
< div class = "mapi-ptr-container" > < / div >
< div class = "mapi-description" >
< div class = "mapi-ptr" > < / div >
< div class = "mapi-declaration mapi-section" > Syntax< / div >
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< div class = "mapi-prototype" > MonoMethodBuilder*
mono_mb_new (MonoClass *klass, const char *name, MonoWrapperType type)
< / div >
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< p / >
< / div > <!-- mapi - description -->
< / div > <!-- height container -->
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< p / > The possible values for the < i > type< / i > argument are:
< pre >
MONO_WRAPPER_NONE
MONO_WRAPPER_DELEGATE_INVOKE
MONO_WRAPPER_DELEGATE_BEGIN_INVOKE
MONO_WRAPPER_DELEGATE_END_INVOKE
MONO_WRAPPER_RUNTIME_INVOKE
MONO_WRAPPER_NATIVE_TO_MANAGED
MONO_WRAPPER_MANAGED_TO_NATIVE
MONO_WRAPPER_REMOTING_INVOKE
MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK
MONO_WRAPPER_XDOMAIN_INVOKE
MONO_WRAPPER_XDOMAIN_DISPATCH
MONO_WRAPPER_LDFLD
MONO_WRAPPER_STFLD
MONO_WRAPPER_LDFLD_REMOTE
MONO_WRAPPER_STFLD_REMOTE
MONO_WRAPPER_SYNCHRONIZED
MONO_WRAPPER_DYNAMIC_METHOD
MONO_WRAPPER_ISINST
MONO_WRAPPER_CASTCLASS
MONO_WRAPPER_PROXY_ISINST
MONO_WRAPPER_STELEMREF
MONO_WRAPPER_UNBOX
MONO_WRAPPER_LDFLDA
MONO_WRAPPER_UNKNOWN
< / pre >
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< h3 > Emitting IL< / h3 >
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< p / > Functions that can be used to generate IL on the flight,
similar in spirit to System.Reflection.Emit.ILGenerator.
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< / div > <!-- class=mapi -->
< a name = "api:mono_mb_emit_add_to_local" > < / a >
< div class = "mapi" >
< div class = "mapi-entry " > < code > mono_mb_emit_add_to_local< / code > < / div >
< div class = "mapi-height-container" >
< div class = "mapi-ptr-container" > < / div >
< div class = "mapi-description" >
< div class = "mapi-ptr" > < / div >
< div class = "mapi-declaration mapi-section" > Syntax< / div >
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< div class = "mapi-prototype" > void
mono_mb_emit_add_to_local (MonoMethodBuilder *mb, guint16 local, gint32 incr)
< / div >
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< p / >
< / div > <!-- mapi - description -->
< / div > <!-- height container -->
< / div > <!-- class=mapi -->
< a name = "api:mono_mb_emit_branch" > < / a >
< div class = "mapi" >
< div class = "mapi-entry " > < code > mono_mb_emit_branch< / code > < / div >
< div class = "mapi-height-container" >
< div class = "mapi-ptr-container" > < / div >
< div class = "mapi-description" >
< div class = "mapi-ptr" > < / div >
< div class = "mapi-declaration mapi-section" > Syntax< / div >
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< div class = "mapi-prototype" > guint32
mono_mb_emit_branch (MonoMethodBuilder *mb, guint8 op)
< / div >
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< p / >
< / div > <!-- mapi - description -->
< / div > <!-- height container -->
< / div > <!-- class=mapi -->
< a name = "api:mono_mb_emit_byte" > < / a >
< div class = "mapi" >
< div class = "mapi-entry " > < code > mono_mb_emit_byte< / code > < / div >
< div class = "mapi-height-container" >
< div class = "mapi-ptr-container" > < / div >
< div class = "mapi-description" >
< div class = "mapi-ptr" > < / div >
< div class = "mapi-declaration mapi-section" > Syntax< / div >
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< div class = "mapi-prototype" > void
mono_mb_emit_byte (MonoMethodBuilder *mb, guint8 op)
< / div >
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< p / >
< / div > <!-- mapi - description -->
< / div > <!-- height container -->
< / div > <!-- class=mapi -->
< a name = "api:mono_mb_emit_exception" > < / a >
< div class = "mapi" >
< div class = "mapi-entry " > < code > mono_mb_emit_exception< / code > < / div >
< div class = "mapi-height-container" >
< div class = "mapi-ptr-container" > < / div >
< div class = "mapi-description" >
< div class = "mapi-ptr" > < / div >
< div class = "mapi-declaration mapi-section" > Syntax< / div >
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< div class = "mapi-prototype" > void
mono_mb_emit_exception (MonoMethodBuilder *mb, const char *exc_name, const char *msg)
< / div >
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< p / >
< / div > <!-- mapi - description -->
< / div > <!-- height container -->
< / div > <!-- class=mapi -->
< a name = "api:mono_mb_emit_i2" > < / a >
< div class = "mapi" >
< div class = "mapi-entry " > < code > mono_mb_emit_i2< / code > < / div >
< div class = "mapi-height-container" >
< div class = "mapi-ptr-container" > < / div >
< div class = "mapi-description" >
< div class = "mapi-ptr" > < / div >
< div class = "mapi-declaration mapi-section" > Syntax< / div >
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< div class = "mapi-prototype" > void
mono_mb_emit_i2 (MonoMethodBuilder *mb, gint16 data)
< / div >
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< p / >
< / div > <!-- mapi - description -->
< / div > <!-- height container -->
< / div > <!-- class=mapi -->
< a name = "api:mono_mb_emit_i4" > < / a >
< div class = "mapi" >
< div class = "mapi-entry " > < code > mono_mb_emit_i4< / code > < / div >
< div class = "mapi-height-container" >
< div class = "mapi-ptr-container" > < / div >
< div class = "mapi-description" >
< div class = "mapi-ptr" > < / div >
< div class = "mapi-declaration mapi-section" > Syntax< / div >
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< div class = "mapi-prototype" > void
mono_mb_emit_i4 (MonoMethodBuilder *mb, gint32 data)
< / div >
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< p / >
< / div > <!-- mapi - description -->
< / div > <!-- height container -->
< / div > <!-- class=mapi -->
< a name = "api:mono_mb_emit_icon" > < / a >
< div class = "mapi" >
< div class = "mapi-entry " > < code > mono_mb_emit_icon< / code > < / div >
< div class = "mapi-height-container" >
< div class = "mapi-ptr-container" > < / div >
< div class = "mapi-description" >
< div class = "mapi-ptr" > < / div >
< div class = "mapi-declaration mapi-section" > Syntax< / div >
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< div class = "mapi-prototype" > void
mono_mb_emit_icon (MonoMethodBuilder *mb, gint32 value)
< / div >
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< p / >
< / div > <!-- mapi - description -->
< / div > <!-- height container -->
< / div > <!-- class=mapi -->
< a name = "api:mono_mb_emit_ldarg_addr" > < / a >
< div class = "mapi" >
< div class = "mapi-entry " > < code > mono_mb_emit_ldarg_addr< / code > < / div >
< div class = "mapi-height-container" >
< div class = "mapi-ptr-container" > < / div >
< div class = "mapi-description" >
< div class = "mapi-ptr" > < / div >
< div class = "mapi-declaration mapi-section" > Syntax< / div >
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< div class = "mapi-prototype" > void
mono_mb_emit_ldarg_addr (MonoMethodBuilder *mb, guint argnum)
< / div >
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< p / >
< / div > <!-- mapi - description -->
< / div > <!-- height container -->
< / div > <!-- class=mapi -->
< a name = "api:mono_mb_emit_ldarg" > < / a >
< div class = "mapi" >
< div class = "mapi-entry " > < code > mono_mb_emit_ldarg< / code > < / div >
< div class = "mapi-height-container" >
< div class = "mapi-ptr-container" > < / div >
< div class = "mapi-description" >
< div class = "mapi-ptr" > < / div >
< div class = "mapi-declaration mapi-section" > Syntax< / div >
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< div class = "mapi-prototype" > void
mono_mb_emit_ldarg (MonoMethodBuilder *mb, guint argnum)
< / div >
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< p / >
< / div > <!-- mapi - description -->
< / div > <!-- height container -->
< / div > <!-- class=mapi -->
< a name = "api:mono_mb_emit_ldflda" > < / a >
< div class = "mapi" >
< div class = "mapi-entry " > < code > mono_mb_emit_ldflda< / code > < / div >
< div class = "mapi-height-container" >
< div class = "mapi-ptr-container" > < / div >
< div class = "mapi-description" >
< div class = "mapi-ptr" > < / div >
< div class = "mapi-declaration mapi-section" > Syntax< / div >
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< div class = "mapi-prototype" > void
mono_mb_emit_ldflda (MonoMethodBuilder *mb, gint32 offset)
< / div >
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< p / >
< / div > <!-- mapi - description -->
< / div > <!-- height container -->
< / div > <!-- class=mapi -->
< a name = "api:mono_mb_emit_ldloc_addr" > < / a >
< div class = "mapi" >
< div class = "mapi-entry " > < code > mono_mb_emit_ldloc_addr< / code > < / div >
< div class = "mapi-height-container" >
< div class = "mapi-ptr-container" > < / div >
< div class = "mapi-description" >
< div class = "mapi-ptr" > < / div >
< div class = "mapi-declaration mapi-section" > Syntax< / div >
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< div class = "mapi-prototype" > void
mono_mb_emit_ldloc_addr (MonoMethodBuilder *mb, guint locnum)
< / div >
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< p / >
< / div > <!-- mapi - description -->
< / div > <!-- height container -->
< / div > <!-- class=mapi -->
< a name = "api:mono_mb_emit_ldloc" > < / a >
< div class = "mapi" >
< div class = "mapi-entry " > < code > mono_mb_emit_ldloc< / code > < / div >
< div class = "mapi-height-container" >
< div class = "mapi-ptr-container" > < / div >
< div class = "mapi-description" >
< div class = "mapi-ptr" > < / div >
< div class = "mapi-declaration mapi-section" > Syntax< / div >
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< div class = "mapi-prototype" > void
mono_mb_emit_ldloc (MonoMethodBuilder *mb, guint num)
< / div >
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< p / >
< / div > <!-- mapi - description -->
< / div > <!-- height container -->
< / div > <!-- class=mapi -->
< a name = "api:mono_mb_emit_ldstr" > < / a >
< div class = "mapi" >
< div class = "mapi-entry " > < code > mono_mb_emit_ldstr< / code > < / div >
< div class = "mapi-height-container" >
< div class = "mapi-ptr-container" > < / div >
< div class = "mapi-description" >
< div class = "mapi-ptr" > < / div >
< div class = "mapi-declaration mapi-section" > Syntax< / div >
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< div class = "mapi-prototype" > void
mono_mb_emit_ldstr (MonoMethodBuilder *mb, char *str)
< / div >
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< p / >
< / div > <!-- mapi - description -->
< / div > <!-- height container -->
< / div > <!-- class=mapi -->
< a name = "api:mono_mb_emit_managed_call" > < / a >
< div class = "mapi" >
< div class = "mapi-entry " > < code > mono_mb_emit_managed_call< / code > < / div >
< div class = "mapi-height-container" >
< div class = "mapi-ptr-container" > < / div >
< div class = "mapi-description" >
< div class = "mapi-ptr" > < / div >
< div class = "mapi-declaration mapi-section" > Syntax< / div >
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< div class = "mapi-prototype" > void
mono_mb_emit_managed_call (MonoMethodBuilder *mb, MonoMethod *method, MonoMethodSignature *opt_sig)
< / div >
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< p / >
< / div > <!-- mapi - description -->
< / div > <!-- height container -->
< / div > <!-- class=mapi -->
< a name = "api:mono_mb_emit_native_call" > < / a >
< div class = "mapi" >
< div class = "mapi-entry " > < code > mono_mb_emit_native_call< / code > < / div >
< div class = "mapi-height-container" >
< div class = "mapi-ptr-container" > < / div >
< div class = "mapi-description" >
< div class = "mapi-ptr" > < / div >
< div class = "mapi-declaration mapi-section" > Syntax< / div >
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< div class = "mapi-prototype" > void
mono_mb_emit_native_call (MonoMethodBuilder *mb, MonoMethodSignature *sig, gpointer func)
< / div >
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< p / >
< / div > <!-- mapi - description -->
< / div > <!-- height container -->
< / div > <!-- class=mapi -->
< a name = "api:mono_mb_emit_stloc" > < / a >
< div class = "mapi" >
< div class = "mapi-entry " > < code > mono_mb_emit_stloc< / code > < / div >
< div class = "mapi-height-container" >
< div class = "mapi-ptr-container" > < / div >
< div class = "mapi-description" >
< div class = "mapi-ptr" > < / div >
< div class = "mapi-declaration mapi-section" > Syntax< / div >
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< div class = "mapi-prototype" > void
mono_mb_emit_stloc (MonoMethodBuilder *mb, guint num)
< / div >
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< p / >
< / div > <!-- mapi - description -->
< / div > <!-- height container -->
< h3 > Local variables and Methods< / h3 >
< / div > <!-- class=mapi -->
< a name = "api:mono_mb_create_method" > < / a >
< div class = "mapi" >
< div class = "mapi-entry " > < code > mono_mb_create_method< / code > < / div >
< div class = "mapi-height-container" >
< div class = "mapi-ptr-container" > < / div >
< div class = "mapi-description" >
< div class = "mapi-ptr" > < / div >
< div class = "mapi-declaration mapi-section" > Syntax< / div >
< div class = "mapi-prototype" > MonoMethod*
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mono_mb_create_method (MonoMethodBuilder *mb, MonoMethodSignature *signature, int max_stack)
< / div >
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< p / >
< div class = "mapi-section" > Return value< / div >
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< div > the newly created method.
< / div >
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< div class = "mapi-section" > Description< / div >
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< div >
Create a < code > MonoMethod< / code > from this method builder.< / div >
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< / div > <!-- mapi - description -->
< / div > <!-- height container -->
< / div > <!-- class=mapi -->
< a name = "api:mono_mb_add_data" > < / a >
< div class = "mapi" >
< div class = "mapi-entry " > < code > mono_mb_add_data< / code > < / div >
< div class = "mapi-height-container" >
< div class = "mapi-ptr-container" > < / div >
< div class = "mapi-description" >
< div class = "mapi-ptr" > < / div >
< div class = "mapi-declaration mapi-section" > Syntax< / div >
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< div class = "mapi-prototype" > guint32
mono_mb_add_data (MonoMethodBuilder *mb, gpointer data)
< / div >
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< p / >
< / div > <!-- mapi - description -->
< / div > <!-- height container -->
< / div > <!-- class=mapi -->
< a name = "api:mono_mb_add_local" > < / a >
< div class = "mapi" >
< div class = "mapi-entry " > < code > mono_mb_add_local< / code > < / div >
< div class = "mapi-height-container" >
< div class = "mapi-ptr-container" > < / div >
< div class = "mapi-description" >
< div class = "mapi-ptr" > < / div >
< div class = "mapi-declaration mapi-section" > Syntax< / div >
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< div class = "mapi-prototype" > int
mono_mb_add_local (MonoMethodBuilder *mb, MonoType *type)
< / div >
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< p / >
< / div > <!-- mapi - description -->
< / div > <!-- height container -->
< / div > <!-- class=mapi -->
< a name = "api:mono_mb_free" > < / a >
< div class = "mapi" >
< div class = "mapi-entry " > < code > mono_mb_free< / code > < / div >
< div class = "mapi-height-container" >
< div class = "mapi-ptr-container" > < / div >
< div class = "mapi-description" >
< div class = "mapi-ptr" > < / div >
< div class = "mapi-declaration mapi-section" > Syntax< / div >
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< div class = "mapi-prototype" > void
mono_mb_free (MonoMethodBuilder *mb)
< / div >
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< p / >
< / div > <!-- mapi - description -->
< / div > <!-- height container -->
< h3 > Patching Addresses< / h3 >
< / div > <!-- class=mapi -->
< a name = "api:mono_mb_patch_addr" > < / a >
< div class = "mapi" >
< div class = "mapi-entry " > < code > mono_mb_patch_addr< / code > < / div >
< div class = "mapi-height-container" >
< div class = "mapi-ptr-container" > < / div >
< div class = "mapi-description" >
< div class = "mapi-ptr" > < / div >
< div class = "mapi-declaration mapi-section" > Syntax< / div >
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< div class = "mapi-prototype" > void
mono_mb_patch_addr (MonoMethodBuilder *mb, int pos, int value)
< / div >
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< p / >
< / div > <!-- mapi - description -->
< / div > <!-- height container -->
< / div > <!-- class=mapi -->
< a name = "api:mono_mb_patch_addr_s" > < / a >
< div class = "mapi" >
< div class = "mapi-entry " > < code > mono_mb_patch_addr_s< / code > < / div >
< div class = "mapi-height-container" >
< div class = "mapi-ptr-container" > < / div >
< div class = "mapi-description" >
< div class = "mapi-ptr" > < / div >
< div class = "mapi-declaration mapi-section" > Syntax< / div >
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< div class = "mapi-prototype" > void
mono_mb_patch_addr_s (MonoMethodBuilder *mb, int pos, gint8 value)
< / div >
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< p / >
< / div > <!-- mapi - description -->
< / div > <!-- height container -->
< h3 > Method Signatures< / h3 >
< / div > <!-- class=mapi -->
< a name = "api:mono_metadata_signature_alloc" > < / a >
< div class = "mapi" >
< div class = "mapi-entry " > < code > mono_metadata_signature_alloc< / code > < / div >
< div class = "mapi-height-container" >
< div class = "mapi-ptr-container" > < / div >
< div class = "mapi-description" >
< div class = "mapi-ptr" > < / div >
< div class = "mapi-declaration mapi-section" > Syntax< / div >
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< div class = "mapi-prototype" > MonoMethodSignature*
mono_metadata_signature_alloc (MonoImage *m, guint32 nparams)
< / div >
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< p / >
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< div class = "mapi-section" > Parameters< / div >
< table class = "mapi-parameters" > < tbody > < tr > < td > < i > image< / i > < / td > < td > metadata context< / td > < / tr > < tr > < td > < i > nparams< / i > < / td > < td > number of parameters in the signature< / td > < / tr > < / tbody > < / table > < div class = "mapi-section" > Return value< / div >
< div > the new < code > MonoMethodSignature< / code > structure.
< / div >
< div class = "mapi-section" > Description< / div >
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< div >
< p / >
Allocate a < code > MonoMethodSignature< / code > structure with the specified number of params.
The return type and the params types need to be filled later.
This is a Mono runtime internal function.
< p / >
LOCKING: Assumes the loader lock is held.
< p / > < / div >
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< / div > <!-- mapi - description -->
< / div > <!-- height container -->
< / div > <!-- class=mapi -->
< a name = "api:mono_metadata_signature_dup" > < / a >
< div class = "mapi" >
< div class = "mapi-entry " > < code > mono_metadata_signature_dup< / code > < / div >
< div class = "mapi-height-container" >
< div class = "mapi-ptr-container" > < / div >
< div class = "mapi-description" >
< div class = "mapi-ptr" > < / div >
< div class = "mapi-declaration mapi-section" > Syntax< / div >
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< div class = "mapi-prototype" > MonoMethodSignature*
mono_metadata_signature_dup (MonoMethodSignature *sig)
< / div >
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< p / >
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< div class = "mapi-section" > Parameters< / div >
< table class = "mapi-parameters" > < tbody > < tr > < td > < i > sig< / i > < / td > < td > method signature< / td > < / tr > < / tbody > < / table > < div class = "mapi-section" > Return value< / div >
< div > the new < code > MonoMethodSignature< / code > structure.
< / div >
< div class = "mapi-section" > Description< / div >
2018-01-24 17:04:36 +00:00
< div >
< p / >
Duplicate an existing < code > MonoMethodSignature< / code > so it can be modified.
This is a Mono runtime internal function.
< p / > < / div >
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< / div > <!-- mapi - description -->
< / div > <!-- height container -->
