mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

platform/CThunkBase.h@189:f392fc9709a3, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 22:31:08 2019 +0000
Revision:
189:f392fc9709a3
mbed library release version 165

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AnnaBridge 189:f392fc9709a3 1 /* mbed Microcontroller Library
AnnaBridge 189:f392fc9709a3 2 * Copyright (c) 2018-2018 ARM Limited
AnnaBridge 189:f392fc9709a3 3 * SPDX-License-Identifier: Apache-2.0
AnnaBridge 189:f392fc9709a3 4 *
AnnaBridge 189:f392fc9709a3 5 * Licensed under the Apache License, Version 2.0 (the "License");
AnnaBridge 189:f392fc9709a3 6 * you may not use this file except in compliance with the License.
AnnaBridge 189:f392fc9709a3 7 * You may obtain a copy of the License at
AnnaBridge 189:f392fc9709a3 8 *
AnnaBridge 189:f392fc9709a3 9 * http://www.apache.org/licenses/LICENSE-2.0
AnnaBridge 189:f392fc9709a3 10 *
AnnaBridge 189:f392fc9709a3 11 * Unless required by applicable law or agreed to in writing, software
AnnaBridge 189:f392fc9709a3 12 * distributed under the License is distributed on an "AS IS" BASIS,
AnnaBridge 189:f392fc9709a3 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
AnnaBridge 189:f392fc9709a3 14 * See the License for the specific language governing permissions and
AnnaBridge 189:f392fc9709a3 15 * limitations under the License.
AnnaBridge 189:f392fc9709a3 16 */
AnnaBridge 189:f392fc9709a3 17
AnnaBridge 189:f392fc9709a3 18 #ifndef __CTHUNK_BASE_H__
AnnaBridge 189:f392fc9709a3 19 #define __CTHUNK_BASE_H__
AnnaBridge 189:f392fc9709a3 20
AnnaBridge 189:f392fc9709a3 21 /* IRQ/Exception compatible thunk entry function */
AnnaBridge 189:f392fc9709a3 22 typedef void (*CThunkEntry)(void);
AnnaBridge 189:f392fc9709a3 23
AnnaBridge 189:f392fc9709a3 24 class CThunkBase {
AnnaBridge 189:f392fc9709a3 25 protected:
AnnaBridge 189:f392fc9709a3 26 typedef void (*Trampoline)(CThunkBase *);
AnnaBridge 189:f392fc9709a3 27
AnnaBridge 189:f392fc9709a3 28 Trampoline _trampoline;
AnnaBridge 189:f392fc9709a3 29
AnnaBridge 189:f392fc9709a3 30 /*
AnnaBridge 189:f392fc9709a3 31 * Allocate a CThunkEntry which can be called without arguments
AnnaBridge 189:f392fc9709a3 32 *
AnnaBridge 189:f392fc9709a3 33 * Calling the CThunkEntry invokes the _trampoline of the
AnnaBridge 189:f392fc9709a3 34 * given cthunk. This function traps if there are no more
AnnaBridge 189:f392fc9709a3 35 * free thunks.
AnnaBridge 189:f392fc9709a3 36 */
AnnaBridge 189:f392fc9709a3 37 static CThunkEntry cthunk_alloc(CThunkBase *cthunk);
AnnaBridge 189:f392fc9709a3 38
AnnaBridge 189:f392fc9709a3 39 /*
AnnaBridge 189:f392fc9709a3 40 * Free a cthunk_entry so it can be reused
AnnaBridge 189:f392fc9709a3 41 */
AnnaBridge 189:f392fc9709a3 42 static void cthunk_free(CThunkEntry cthunk_entry);
AnnaBridge 189:f392fc9709a3 43
AnnaBridge 189:f392fc9709a3 44 private:
AnnaBridge 189:f392fc9709a3 45 typedef void (*CthunkFree)(CThunkEntry cthunk_entry);
AnnaBridge 189:f392fc9709a3 46
AnnaBridge 189:f392fc9709a3 47 /*
AnnaBridge 189:f392fc9709a3 48 * Table of thunk functions
AnnaBridge 189:f392fc9709a3 49 */
AnnaBridge 189:f392fc9709a3 50 static const CThunkEntry _thunk_table[MBED_CONF_PLATFORM_CTHUNK_COUNT_MAX];
AnnaBridge 189:f392fc9709a3 51
AnnaBridge 189:f392fc9709a3 52 /*
AnnaBridge 189:f392fc9709a3 53 * Table of active CThunk classes
AnnaBridge 189:f392fc9709a3 54 */
AnnaBridge 189:f392fc9709a3 55 static CThunkBase *_thunk_storage[MBED_CONF_PLATFORM_CTHUNK_COUNT_MAX];
AnnaBridge 189:f392fc9709a3 56
AnnaBridge 189:f392fc9709a3 57 /*
AnnaBridge 189:f392fc9709a3 58 * Lazily initialized free function pointer
AnnaBridge 189:f392fc9709a3 59 */
AnnaBridge 189:f392fc9709a3 60 static CthunkFree _cthunk_free_real;
AnnaBridge 189:f392fc9709a3 61
AnnaBridge 189:f392fc9709a3 62 /*
AnnaBridge 189:f392fc9709a3 63 * Actual free function
AnnaBridge 189:f392fc9709a3 64 */
AnnaBridge 189:f392fc9709a3 65 static void cthunk_free_real(CThunkEntry cthunk_entry);
AnnaBridge 189:f392fc9709a3 66
AnnaBridge 189:f392fc9709a3 67 /*
AnnaBridge 189:f392fc9709a3 68 * Template function which stored in the _thunk_table
AnnaBridge 189:f392fc9709a3 69 */
AnnaBridge 189:f392fc9709a3 70 template<int N>
AnnaBridge 189:f392fc9709a3 71 static void thunk_entry()
AnnaBridge 189:f392fc9709a3 72 {
AnnaBridge 189:f392fc9709a3 73 _thunk_storage[N]->_trampoline(_thunk_storage[N]);
AnnaBridge 189:f392fc9709a3 74 }
AnnaBridge 189:f392fc9709a3 75 };
AnnaBridge 189:f392fc9709a3 76
AnnaBridge 189:f392fc9709a3 77 #endif/*__CTHUNK_BASE_H__*/
AnnaBridge 189:f392fc9709a3 78