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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

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mbed 2

This is the mbed 2 library. If you'd like to learn about Mbed OS please see the mbed-os docs.

platform/CThunkBase.h@172:65be27845400, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 20:53:29 2019 +0000
Revision:
172:65be27845400
mbed library release version 165

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AnnaBridge 172:65be27845400 1 /* mbed Microcontroller Library
AnnaBridge 172:65be27845400 2 * Copyright (c) 2018-2018 ARM Limited
AnnaBridge 172:65be27845400 3 * SPDX-License-Identifier: Apache-2.0
AnnaBridge 172:65be27845400 4 *
AnnaBridge 172:65be27845400 5 * Licensed under the Apache License, Version 2.0 (the "License");
AnnaBridge 172:65be27845400 6 * you may not use this file except in compliance with the License.
AnnaBridge 172:65be27845400 7 * You may obtain a copy of the License at
AnnaBridge 172:65be27845400 8 *
AnnaBridge 172:65be27845400 9 * http://www.apache.org/licenses/LICENSE-2.0
AnnaBridge 172:65be27845400 10 *
AnnaBridge 172:65be27845400 11 * Unless required by applicable law or agreed to in writing, software
AnnaBridge 172:65be27845400 12 * distributed under the License is distributed on an "AS IS" BASIS,
AnnaBridge 172:65be27845400 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
AnnaBridge 172:65be27845400 14 * See the License for the specific language governing permissions and
AnnaBridge 172:65be27845400 15 * limitations under the License.
AnnaBridge 172:65be27845400 16 */
AnnaBridge 172:65be27845400 17
AnnaBridge 172:65be27845400 18 #ifndef __CTHUNK_BASE_H__
AnnaBridge 172:65be27845400 19 #define __CTHUNK_BASE_H__
AnnaBridge 172:65be27845400 20
AnnaBridge 172:65be27845400 21 /* IRQ/Exception compatible thunk entry function */
AnnaBridge 172:65be27845400 22 typedef void (*CThunkEntry)(void);
AnnaBridge 172:65be27845400 23
AnnaBridge 172:65be27845400 24 class CThunkBase {
AnnaBridge 172:65be27845400 25 protected:
AnnaBridge 172:65be27845400 26 typedef void (*Trampoline)(CThunkBase *);
AnnaBridge 172:65be27845400 27
AnnaBridge 172:65be27845400 28 Trampoline _trampoline;
AnnaBridge 172:65be27845400 29
AnnaBridge 172:65be27845400 30 /*
AnnaBridge 172:65be27845400 31 * Allocate a CThunkEntry which can be called without arguments
AnnaBridge 172:65be27845400 32 *
AnnaBridge 172:65be27845400 33 * Calling the CThunkEntry invokes the _trampoline of the
AnnaBridge 172:65be27845400 34 * given cthunk. This function traps if there are no more
AnnaBridge 172:65be27845400 35 * free thunks.
AnnaBridge 172:65be27845400 36 */
AnnaBridge 172:65be27845400 37 static CThunkEntry cthunk_alloc(CThunkBase *cthunk);
AnnaBridge 172:65be27845400 38
AnnaBridge 172:65be27845400 39 /*
AnnaBridge 172:65be27845400 40 * Free a cthunk_entry so it can be reused
AnnaBridge 172:65be27845400 41 */
AnnaBridge 172:65be27845400 42 static void cthunk_free(CThunkEntry cthunk_entry);
AnnaBridge 172:65be27845400 43
AnnaBridge 172:65be27845400 44 private:
AnnaBridge 172:65be27845400 45 typedef void (*CthunkFree)(CThunkEntry cthunk_entry);
AnnaBridge 172:65be27845400 46
AnnaBridge 172:65be27845400 47 /*
AnnaBridge 172:65be27845400 48 * Table of thunk functions
AnnaBridge 172:65be27845400 49 */
AnnaBridge 172:65be27845400 50 static const CThunkEntry _thunk_table[MBED_CONF_PLATFORM_CTHUNK_COUNT_MAX];
AnnaBridge 172:65be27845400 51
AnnaBridge 172:65be27845400 52 /*
AnnaBridge 172:65be27845400 53 * Table of active CThunk classes
AnnaBridge 172:65be27845400 54 */
AnnaBridge 172:65be27845400 55 static CThunkBase *_thunk_storage[MBED_CONF_PLATFORM_CTHUNK_COUNT_MAX];
AnnaBridge 172:65be27845400 56
AnnaBridge 172:65be27845400 57 /*
AnnaBridge 172:65be27845400 58 * Lazily initialized free function pointer
AnnaBridge 172:65be27845400 59 */
AnnaBridge 172:65be27845400 60 static CthunkFree _cthunk_free_real;
AnnaBridge 172:65be27845400 61
AnnaBridge 172:65be27845400 62 /*
AnnaBridge 172:65be27845400 63 * Actual free function
AnnaBridge 172:65be27845400 64 */
AnnaBridge 172:65be27845400 65 static void cthunk_free_real(CThunkEntry cthunk_entry);
AnnaBridge 172:65be27845400 66
AnnaBridge 172:65be27845400 67 /*
AnnaBridge 172:65be27845400 68 * Template function which stored in the _thunk_table
AnnaBridge 172:65be27845400 69 */
AnnaBridge 172:65be27845400 70 template<int N>
AnnaBridge 172:65be27845400 71 static void thunk_entry()
AnnaBridge 172:65be27845400 72 {
AnnaBridge 172:65be27845400 73 _thunk_storage[N]->_trampoline(_thunk_storage[N]);
AnnaBridge 172:65be27845400 74 }
AnnaBridge 172:65be27845400 75 };
AnnaBridge 172:65be27845400 76
AnnaBridge 172:65be27845400 77 #endif/*__CTHUNK_BASE_H__*/
AnnaBridge 172:65be27845400 78