X-Git-Url: https://git.m6w6.name/?p=m6w6%2Fext-psi;a=blobdiff_plain;f=src%2Flibffi.c;h=644b0fed5d8b6d70f64dd34205d62081653b34cd;hp=eb5b2b518aa800bf8f9922d50cdd1d66e833785c;hb=370510d04a5e22140e1e7f90f5d1f0002e6dbee6;hpb=f6b2422d4a9cb0424412a4077241cfd5bcb9ebeb diff --git a/src/libffi.c b/src/libffi.c index eb5b2b5..644b0fe 100644 --- a/src/libffi.c +++ b/src/libffi.c @@ -1,6 +1,41 @@ +/******************************************************************************* + Copyright (c) 2016, Michael Wallner . + All rights reserved. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are met: + + * Redistributions of source code must retain the above copyright notice, + this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE + FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*******************************************************************************/ + +#include "php_psi_stdinc.h" +#include "context.h" +#include "call.h" #include "php.h" -#include "php_psi.h" -#include "libffi.h" + +#ifdef HAVE_LIBFFI + +#undef PACKAGE +#undef PACKAGE_BUGREPORT +#undef PACKAGE_NAME +#undef PACKAGE_STRING +#undef PACKAGE_TARNAME +#undef PACKAGE_VERSION #include @@ -10,6 +45,9 @@ # endif # if HAVE_SYS_MMAN_H # include +# ifndef MAP_ANONYMOUS +# define MAP_ANONYMOUS MAP_ANON +# endif # endif #endif @@ -25,7 +63,21 @@ static void *psi_ffi_closure_alloc(size_t s, void **code) } return *code; #else - return NULL; +# error "Neither ffi_closure_alloc() nor mmap() available" +#endif +} + +static ffi_status psi_ffi_prep_closure(ffi_closure **closure, void **code, ffi_cif *sig, void (*handler)(ffi_cif*,void*,void**,void*), void *data) { + *closure = psi_ffi_closure_alloc(sizeof(ffi_closure), code); + assert(*closure != NULL); + +#if PSI_HAVE_FFI_PREP_CLOSURE_LOC + return ffi_prep_closure_loc(*closure, sig, handler, data, *code); + +#elif PSI_HAVE_FFI_PREP_CLOSURE + return ffi_prep_closure(*code, sig, handler, data); +#else +# error "Neither ffi_prep_closure() nor ffi_prep_closure_loc() is available" #endif } @@ -38,41 +90,157 @@ static void psi_ffi_closure_free(void *c) #endif } -static void handler(ffi_cif *signature, void *_result, void **_args, void *_data); +static void psi_ffi_prep_va(ffi_cif *base, ffi_cif *signature, size_t argc, size_t va_count, + ffi_type **param_types) { + ffi_status rc; + +#ifdef PSI_HAVE_FFI_PREP_CIF_VAR + rc = ffi_prep_cif_var(signature, base->abi, argc, argc + va_count, + base->rtype, param_types); +#else + /* FIXME: test in config.m4; assume we can just call anyway */ + rc = ffi_prep_cif(signature, base->abi, argc + va_count, base->rtype, param_types); +#endif + + assert(FFI_OK == rc); +} + +static inline ffi_type *psi_ffi_decl_arg_type(struct psi_decl_arg *darg); + +struct psi_ffi_context { + ffi_cif signature; + ffi_type *params[2]; +}; + +struct psi_ffi_call { + struct psi_context *context; + union { + struct { + struct psi_impl *impl; + struct psi_call_frame *frame; + } fn; + struct { + struct psi_let_exp *let_exp; + struct psi_ffi_call *impl_call; + } cb; + } impl; + void *code; + ffi_closure *closure; + ffi_cif signature; + ffi_type *params[1]; /* [type1, type2, ... ] */ +}; + +static void psi_ffi_handler(ffi_cif *sig, void *result, void **args, void *data) +{ + struct psi_ffi_call *call = data; + + psi_context_call(call->context, *(zend_execute_data **)args[0], *(zval **)args[1], call->impl.fn.impl); +} + +static void psi_ffi_callback(ffi_cif *sig, void *result, void **args, void *data) +{ + struct psi_ffi_call *call = data, *impl_call = call->impl.cb.impl_call; + + if (impl_call->impl.fn.frame) { + struct psi_call_frame_callback cbdata; + + cbdata.cb = call->impl.cb.let_exp; + cbdata.argc = sig->nargs; + cbdata.argv = args; + cbdata.rval = result; + + psi_call_frame_do_callback(impl_call->impl.fn.frame, &cbdata); + } else { + assert(0); + } +} static inline ffi_abi psi_ffi_abi(const char *convention) { + if (FFI_LAST_ABI - 2 != FFI_FIRST_ABI) { +#ifdef HAVE_FFI_STDCALL + if (!strcasecmp(convention, "stdcall")) { + return FFI_STDCALL; + } +#endif +#ifdef HAVE_FFI_FASTCALL + if (!strcasecmp(convention, "fastcall")) { + return FFI_FASTCALL; + } +#endif + } return FFI_DEFAULT_ABI; } -static inline ffi_type *psi_ffi_type(token_t t) { + +static inline struct psi_ffi_call *psi_ffi_call_alloc(struct psi_context *C, struct psi_decl *decl) { + int rc; + size_t i, c = psi_plist_count(decl->args); + struct psi_ffi_call *call = calloc(1, sizeof(*call) + 2 * c * sizeof(void *)); + struct psi_decl_arg *arg; + + decl->info = call; + call->context = C; + + for (i = 0; psi_plist_get(decl->args, i, &arg); ++i) { + call->params[i] = psi_ffi_decl_arg_type(arg); + } + call->params[c] = NULL; + + rc = ffi_prep_cif(&call->signature, psi_ffi_abi(decl->abi->convention), + c, psi_ffi_decl_arg_type(decl->func), call->params); + assert(FFI_OK == rc); + + return call; +} + +static inline ffi_status psi_ffi_call_init_closure(struct psi_context *C, struct psi_ffi_call *call, struct psi_impl *impl) { + struct psi_ffi_context *context = C->context; + + call->impl.fn.impl = impl; + return psi_ffi_prep_closure(&call->closure, &call->code, &context->signature, psi_ffi_handler, call); +} + +static inline ffi_status psi_ffi_call_init_callback_closure(struct psi_context *C, + struct psi_ffi_call *call, struct psi_ffi_call *impl_call, + struct psi_let_exp *cb) { + call->impl.cb.let_exp = cb; + call->impl.cb.impl_call = impl_call; + return psi_ffi_prep_closure(&call->closure, &call->code, &call->signature, psi_ffi_callback, call); +} + +static inline void psi_ffi_call_free(struct psi_ffi_call *call) { + if (call->closure) { + psi_ffi_closure_free(call->closure); + } + free(call); +} + +static inline ffi_type *psi_ffi_token_type(token_t t) { switch (t) { default: - ZEND_ASSERT(0); + assert(0); /* no break */ case PSI_T_VOID: return &ffi_type_void; - case PSI_T_SINT8: + case PSI_T_INT8: return &ffi_type_sint8; case PSI_T_UINT8: return &ffi_type_uint8; - case PSI_T_SINT16: + case PSI_T_INT16: return &ffi_type_sint16; case PSI_T_UINT16: return &ffi_type_uint16; - case PSI_T_SINT32: + case PSI_T_INT32: return &ffi_type_sint32; case PSI_T_UINT32: return &ffi_type_uint32; - case PSI_T_SINT64: + case PSI_T_INT64: return &ffi_type_sint64; case PSI_T_UINT64: return &ffi_type_uint64; case PSI_T_BOOL: return &ffi_type_uchar; - case PSI_T_CHAR: - return &ffi_type_schar; - case PSI_T_SHORT: - return &ffi_type_sshort; case PSI_T_INT: + case PSI_T_ENUM: return &ffi_type_sint; case PSI_T_LONG: return &ffi_type_slong; @@ -80,89 +248,144 @@ static inline ffi_type *psi_ffi_type(token_t t) { return &ffi_type_float; case PSI_T_DOUBLE: return &ffi_type_double; +#ifdef HAVE_LONG_DOUBLE + case PSI_T_LONG_DOUBLE: + return &ffi_type_longdouble; +#endif + case PSI_T_POINTER: + case PSI_T_FUNCTION: + return &ffi_type_pointer; } } -static inline ffi_type *psi_ffi_decl_type(decl_type *type) { - return psi_ffi_type(real_decl_type(type)->type); -} -static inline ffi_type *psi_ffi_decl_arg_type(decl_arg *darg) { - if (darg->var->pointer_level) { +static inline ffi_type *psi_ffi_impl_type(token_t impl_type) { + switch (impl_type) { + case PSI_T_BOOL: + return &ffi_type_sint8; + case PSI_T_INT: + return &ffi_type_sint64; + case PSI_T_STRING: return &ffi_type_pointer; - } else { - return psi_ffi_decl_type(darg->type); + case PSI_T_FLOAT: + case PSI_T_DOUBLE: + return &ffi_type_double; + EMPTY_SWITCH_DEFAULT_CASE(); } + return NULL; } +static void psi_ffi_struct_type_dtor(void *type) { + ffi_type *strct = type; -typedef struct PSI_LibffiContext { - ffi_cif signature; - ffi_type *params[2]; - struct { - struct PSI_LibffiData **list; - size_t count; - } data; -} PSI_LibffiContext; - -typedef struct PSI_LibffiData { - PSI_LibffiContext *context; - impl *impl; - zend_internal_arg_info *arginfo; - void *code; - ffi_closure *closure; - ffi_cif signature; - ffi_type *params[1]; -} PSI_LibffiData; + if (strct->elements) { + ffi_type **ptr; -static inline PSI_LibffiData *PSI_LibffiDataAlloc(PSI_LibffiContext *context, impl *impl) { - ffi_status rc; - size_t i, c = impl->decl->args->count; - PSI_LibffiData *data = malloc(sizeof(*data) + c * sizeof(ffi_type *)); - - data->context = context; - data->impl = impl; - data->arginfo = psi_internal_arginfo(impl); - for (i = 0; i < c; ++i) { - data->params[i] = psi_ffi_decl_arg_type(impl->decl->args->args[i]); + for (ptr = strct->elements; *ptr; ++ptr) { + free(*ptr); + } + free(strct->elements); } - data->params[c] = NULL; - - rc = ffi_prep_cif( - &data->signature, - psi_ffi_abi(data->impl->decl->abi->convention), - c, - psi_ffi_decl_arg_type(data->impl->decl->func), - data->params); - ZEND_ASSERT(FFI_OK == rc); - - data->closure = psi_ffi_closure_alloc(sizeof(ffi_closure), &data->code); - ZEND_ASSERT(data->closure != NULL); -#if PSI_HAVE_FFI_PREP_CLOSURE_LOC - rc = ffi_prep_closure_loc( - data->closure, - &context->signature, - handler, - data, - data->code); - ZEND_ASSERT(FFI_OK == rc); -#elif PSI_HAVE_FFI_PREP_CLOSURE - rc = ffi_prep_closure(data->code, &context->signature, handler, data); - ZEND_ASSERT(FFI_OK == rc); -#else -# error "Neither ffi_prep_closure() nor ffi_prep_closure_loc() available" -#endif + free(strct); +} + +static size_t psi_ffi_struct_type_pad(ffi_type **els, size_t padding) { + size_t i; + + for (i = 0; i < padding; ++i) { + ffi_type *pad = malloc(sizeof(*pad)); + + memcpy(pad, &ffi_type_schar, sizeof(*pad)); + *els++ = pad; + } + + return padding; +} + +static ffi_type **psi_ffi_struct_type_elements(struct psi_decl_struct *strct) { + size_t i = 0, argc = psi_plist_count(strct->args), nels = 0, offset = 0, maxalign = 0; + ffi_type **tmp, **els = calloc(argc + 1, sizeof(*els)); + struct psi_decl_arg *darg; + + while (psi_plist_get(strct->args, i++, &darg)) { + ffi_type *type = malloc(sizeof(*type)); + size_t padding; + + *type = *psi_ffi_decl_arg_type(darg); + + if (type->alignment > maxalign) { + maxalign = type->alignment; + } - context->data.list = realloc(context->data.list, ++context->data.count * sizeof(*context->data.list)); - context->data.list[context->data.count-1] = data; + assert(type->size == darg->layout->len); + if ((padding = psi_offset_padding(darg->layout->pos - offset, type->alignment))) { + if (nels + padding + 1 > argc) { + argc += padding; + tmp = realloc(els, (argc + 1) * sizeof(*els)); + if (tmp) { + els = tmp; + } else { + free(els); + return NULL; + } + els[argc] = NULL; + } + psi_ffi_struct_type_pad(&els[nels], padding); + nels += padding; + offset += padding; + } + assert(offset == darg->layout->pos); + + offset = (offset + darg->layout->len + type->alignment - 1) & ~(type->alignment - 1); + els[nels++] = type; + } + + /* apply struct alignment padding */ + offset = (offset + maxalign - 1) & ~(maxalign - 1); + + assert(offset <= strct->size); + if (offset < strct->size) { + psi_ffi_struct_type_pad(&els[nels], strct->size - offset); + } - return data; + return els; } +static inline ffi_type *psi_ffi_decl_type(struct psi_decl_type *type) { + struct psi_decl_type *real = psi_decl_type_get_real(type); + + switch (real->type) { + case PSI_T_STRUCT: + if (!real->real.strct->engine.type) { + ffi_type *strct = calloc(1, sizeof(ffi_type)); + + strct->type = FFI_TYPE_STRUCT; + strct->size = 0; + strct->elements = psi_ffi_struct_type_elements(real->real.strct); + + real->real.strct->engine.type = strct; + real->real.strct->engine.dtor = psi_ffi_struct_type_dtor; + } + + return real->real.strct->engine.type; -static inline void PSI_LibffiDataFree(PSI_LibffiData *data) { - psi_ffi_closure_free(data->closure); - free(data->arginfo); - free(data); + case PSI_T_UNION: + { + struct psi_decl_arg *arg; + psi_plist_get(real->real.unn->args, 0, &arg); + return psi_ffi_decl_arg_type(arg); + } + + default: + return psi_ffi_token_type(real->type); + } } +static inline ffi_type *psi_ffi_decl_arg_type(struct psi_decl_arg *darg) { + if (darg->var->pointer_level) { + return &ffi_type_pointer; + } else { + return psi_ffi_decl_type(darg->type); + } +} + -static inline PSI_LibffiContext *PSI_LibffiContextInit(PSI_LibffiContext *L) { +static inline struct psi_ffi_context *psi_ffi_context_init(struct psi_ffi_context *L) { ffi_status rc; if (!L) { @@ -173,123 +396,222 @@ static inline PSI_LibffiContext *PSI_LibffiContextInit(PSI_LibffiContext *L) { L->params[0] = &ffi_type_pointer; L->params[1] = &ffi_type_pointer; rc = ffi_prep_cif(&L->signature, FFI_DEFAULT_ABI, 2, &ffi_type_void, L->params); - ZEND_ASSERT(rc == FFI_OK); + assert(rc == FFI_OK); return L; } -static inline void PSI_LibffiContextDtor(PSI_LibffiContext *L) { - size_t i; - - for (i = 0; i < L->data.count; ++i) { - PSI_LibffiDataFree(L->data.list[i]); - } - if (L->data.list) { - free(L->data.list); - } -} - -static inline void PSI_LibffiContextFree(PSI_LibffiContext **L) { +static inline void psi_ffi_context_free(struct psi_ffi_context **L) { if (*L) { - PSI_LibffiContextDtor(*L); free(*L); *L = NULL; } } -static void handler(ffi_cif *_sig, void *_result, void **_args, void *_data) +static void psi_ffi_init(struct psi_context *C) { - PSI_LibffiData *data = _data; - size_t i; - void **arg_ptr = NULL, **arg_prm = NULL; - impl_val ret_val; + C->context = psi_ffi_context_init(NULL); +} - if (SUCCESS != psi_parse_args(*(zend_execute_data **)_args[0], data->impl)) { - return; - } +static inline void psi_ffi_destroy_callbacks(struct psi_context *C, struct psi_let_exp *let_exp) { + struct psi_let_callback *cb; + struct psi_let_func *fn = NULL; - if (data->impl->decl->args->count) { - arg_ptr = malloc(data->impl->decl->args->count * sizeof(*arg_ptr)); - arg_prm = malloc(data->impl->decl->args->count * sizeof(*arg_prm)); + switch (let_exp->kind) { + case PSI_LET_CALLBACK: + cb = let_exp->data.callback; - for (i = 0; i < data->impl->decl->args->count; ++i) { - decl_arg *darg = data->impl->decl->args->args[i]; + if (cb->decl && cb->decl->info) { + psi_ffi_call_free(cb->decl->info); + } + fn = cb->func; + /* no break */ + case PSI_LET_FUNC: + if (!fn) { + fn = let_exp->data.func; + } - arg_ptr[i] = psi_do_let(darg); - arg_prm[i] = darg->let->val->is_reference ? &arg_ptr[i] : arg_ptr[i]; + if (fn->inner) { + size_t i = 0; + struct psi_let_exp *cb; - darg->let->ptr = arg_ptr[i]; + while (psi_plist_get(fn->inner, i++, &cb)) { + psi_ffi_destroy_callbacks(C, cb); + } } + break; + default: + break; } +} - ffi_call(&data->signature, FFI_FN(data->impl->decl->dlptr), &ret_val, arg_prm); - - psi_do_return(data->impl, &ret_val, *(zval **)_args[1]); - - for (i = 0; i < data->impl->stmts->set.count; ++i) { - set_stmt *set = data->impl->stmts->set.list[i]; +static void psi_ffi_dtor(struct psi_context *C) +{ + if (C->decls) { + size_t i = 0; + struct psi_decl *decl; + + while (psi_plist_get(C->decls, i++, &decl)) { + if (decl->info) { + psi_ffi_call_free(decl->info); + } + } - psi_do_set(set->arg->_zv, set->val->func, set->val->vars); } + if (C->impls) { + size_t i = 0; + struct psi_impl *impl; - for (i = 0; i < data->impl->stmts->fre.count; ++i) { - free_stmt *fre = data->impl->stmts->fre.list[i]; + while (psi_plist_get(C->impls, i++, &impl)) { + size_t j = 0; + struct psi_let_stmt *let; - psi_do_free(fre); + while (psi_plist_get(impl->stmts.let, j++, &let)) { + psi_ffi_destroy_callbacks(C, let->exp); + } + } } + psi_ffi_context_free((void *) &C->context); +} - psi_do_clean(data->impl); +static inline void psi_ffi_compile_callbacks(struct psi_context *C, + struct psi_ffi_call *impl_call, struct psi_let_exp *let_exp) { + struct psi_ffi_call *call; + struct psi_let_callback *cb; + struct psi_let_func *fn = NULL; + + switch (let_exp->kind) { + case PSI_LET_CALLBACK: + cb = let_exp->data.callback; + if ((call = psi_ffi_call_alloc(C, cb->decl))) { + if (FFI_OK != psi_ffi_call_init_callback_closure(C, call, impl_call, let_exp)) { + psi_ffi_call_free(call); + break; + } + + cb->decl->sym = call->code; + } + fn = cb->func; + /* no break */ + case PSI_LET_FUNC: + if (!fn) { + fn = let_exp->data.func; + } + if (fn->inner) { + size_t i = 0; + struct psi_let_exp *inner_let; - if (arg_ptr) { - free(arg_ptr); - } - if (arg_prm) { - free(arg_prm); + while (psi_plist_get(fn->inner, i++, &inner_let)) { + psi_ffi_compile_callbacks(C, impl_call, inner_let); + } + } + break; + default: + break; } } -static void init(PSI_Context *C) +static zend_function_entry *psi_ffi_compile(struct psi_context *C) { - C->context = PSI_LibffiContextInit(NULL); -} + size_t i = 0, d = 0, nf = 0; + struct psi_impl *impl; + struct psi_decl *decl; + zend_function_entry *zfe; -static void dtor(PSI_Context *C) -{ - PSI_LibffiContextFree((void *) &C->context); -} + if (!C->impls) { + return NULL; + } -static zend_function_entry *compile(PSI_Context *C, PSI_Data *D) -{ - size_t i, j = 0; - zend_function_entry *zfe = calloc(D->impls->count + 1, sizeof(*zfe)); - PSI_LibffiContext *ctx = C->context; + zfe = calloc(psi_plist_count(C->impls) + 1, sizeof(*zfe)); - for (i = 0; i < D->impls->count; ++i) { - zend_function_entry *zf = &zfe[j]; - PSI_LibffiData *data; + while (psi_plist_get(C->impls, i++, &impl)) { + size_t l = 0; + struct psi_let_stmt *let; + struct psi_ffi_call *call; + zend_function_entry *zf = &zfe[nf]; - if (!D->impls->list[i]->decl) { + if (!impl->decl) { + continue; + } + if (!(call = psi_ffi_call_alloc(C, impl->decl))) { + continue; + } + if (FFI_OK != psi_ffi_call_init_closure(C, call, impl)) { + psi_ffi_call_free(call); continue; } - data = PSI_LibffiDataAlloc(ctx, D->impls->list[i]); - zf->fname = D->impls->list[i]->func->name + (D->impls->list[i]->func->name[0] == '\\'); - zf->num_args = D->impls->list[i]->func->args->count; - zf->handler = data->code; - zf->arg_info = data->arginfo; - ++j; + zf->fname = impl->func->name + (impl->func->name[0] == '\\'); + zf->handler = call->code; + zf->num_args = psi_plist_count(impl->func->args); + zf->arg_info = psi_internal_arginfo(impl); + ++nf; + + while (psi_plist_get(impl->stmts.let, l++, &let)) { + psi_ffi_compile_callbacks(C, call, let->exp); + } + } + + while (psi_plist_get(C->decls, d++, &decl)) { + if (decl->info) { + continue; + } + + psi_ffi_call_alloc(C, decl); } return zfe; } -static PSI_ContextOps ops = { - init, - dtor, - compile, +static void psi_ffi_call(struct psi_context *C, struct psi_call_frame *frame, struct psi_decl *decl, void *rval, void **args) { + struct psi_ffi_call *info = decl->info; + struct psi_call_frame *prev = info->impl.fn.frame; + + info->impl.fn.frame = frame; + ffi_call(&info->signature, FFI_FN(decl->sym), rval, args); + info->impl.fn.frame = prev; +} + +static void psi_ffi_call_va(struct psi_context *C, struct psi_call_frame *frame, struct psi_decl *decl, void *rval, void **args, + size_t va_count, void **va_types) { + ffi_cif signature; + struct psi_ffi_call *info = decl->info; + struct psi_call_frame *prev = info->impl.fn.frame; + size_t argc = psi_plist_count(decl->args); + ffi_type **param_types = ecalloc(argc + va_count + 1, sizeof(ffi_type *)); + + memcpy(param_types, info->params, argc * sizeof(ffi_type *)); + memcpy(param_types + argc, va_types, va_count * sizeof(ffi_type *)); + + psi_ffi_prep_va(&info->signature, &signature, argc, va_count, param_types); + info->impl.fn.frame = frame; + ffi_call(&signature, FFI_FN(decl->sym), rval, args); + info->impl.fn.frame = prev; + efree(param_types); +} + +static void *psi_ffi_query(struct psi_context *C, enum psi_context_query q, void *arg) { + switch (q) { + case PSI_CONTEXT_QUERY_SELF: + return "ffi"; + case PSI_CONTEXT_QUERY_TYPE: + return psi_ffi_impl_type(*(token_t *) arg); + } + return NULL; +} + +static struct psi_context_ops ops = { + psi_ffi_init, + psi_ffi_dtor, + psi_ffi_compile, + psi_ffi_call, + psi_ffi_call_va, + psi_ffi_query, }; -PSI_ContextOps *PSI_Libffi(void) +struct psi_context_ops *psi_libffi_ops(void) { return &ops; } + +#endif /* HAVE_LIBFFI */