projects / lttng-tools.git / blame
| Commit | Line | Data |
|---|---|---|
| f2c1f0d4 | 1 | /* |
| ab5be9fa MJ |
2 | * Copyright (C) 2019 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 3 | * Copyright (C) 2019 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
| f2c1f0d4 | 4 | * |
| ab5be9fa | 5 | * SPDX-License-Identifier: LGPL-2.1-only |
| f2c1f0d4 | 6 | * |
| f2c1f0d4 MD |
7 | */ |
| 8 | ||
| 9 | #ifndef LTTNG_CLEAR_HANDLE_H | |
| 10 | #define LTTNG_CLEAR_HANDLE_H | |
| 11 | ||
| 12 | #include <lttng/lttng-error.h> | |
| 13 | ||
| 14 | #ifdef __cplusplus | |
| 15 | extern "C" { | |
| 16 | #endif | |
| 17 | ||
| 18 | /* | |
| 19 | * Handle used to represent a specific instance of session clear | |
| 20 | * operation. | |
| 21 | */ | |
| 22 | struct lttng_clear_handle; | |
| 23 | ||
| 24 | /* | |
| 25 | * Negative values indicate errors. Values >= 0 indicate success. | |
| 26 | */ | |
| 27 | enum lttng_clear_handle_status { | |
| 28 | LTTNG_CLEAR_HANDLE_STATUS_ERROR = -2, | |
| 29 | LTTNG_CLEAR_HANDLE_STATUS_INVALID = -1, | |
| 30 | LTTNG_CLEAR_HANDLE_STATUS_OK = 0, | |
| 31 | LTTNG_CLEAR_HANDLE_STATUS_COMPLETED = 1, | |
| 32 | LTTNG_CLEAR_HANDLE_STATUS_TIMEOUT = 2, | |
| 33 | }; | |
| 34 | ||
| 35 | /* | |
| 36 | * Destroy an lttng_clear_handle. | |
| 37 | * The handle should be discarded after this call. | |
| 38 | */ | |
| 39 | extern void lttng_clear_handle_destroy(struct lttng_clear_handle *handle); | |
| 40 | ||
| 41 | /* | |
| 42 | * Wait for a session clear operation to complete. | |
| 43 | * | |
| 44 | * A negative timeout_ms value can be used to wait indefinitely. | |
| 45 | * | |
| 46 | * Returns LTTNG_CLEAR_HANDLE_STATUS_COMPLETED if the session clear | |
| 47 | * operation was completed. LTTNG_CLEAR_HANDLE_STATUS_TIMEOUT is returned | |
| 48 | * to indicate that the wait timed out. | |
| 49 | * On error, one of the negative lttng_clear_handle_status is returned. | |
| 50 | * | |
| 51 | * Note: This function returning a success status does not mean that | |
| 52 | * the clear operation itself succeeded; it indicates that the _wait_ | |
| 53 | * operation completed successfully. | |
| 54 | */ | |
| 55 | extern enum lttng_clear_handle_status | |
| 56 | lttng_clear_handle_wait_for_completion( | |
| 57 | struct lttng_clear_handle *handle, int timeout_ms); | |
| 58 | ||
| 59 | /* | |
| 60 | * Get the result of a session clear operation. | |
| 61 | * | |
| 62 | * This function must be used on a clear handle which was successfully waited | |
| 63 | * on. | |
| 64 | * | |
| 65 | * Returns LTTNG_CLEAR_HANDLE_STATUS_OK if the result of the session | |
| 66 | * clear operation could be obtained. Check the value of 'result' to | |
| 67 | * determine if the session clear operation completed successfully or not. | |
| 68 | * | |
| 69 | * On error, one of the negative lttng_clear_handle_status is returned. | |
| 70 | * Returns LTTNG_CLEAR_HANDLE_STATUS_INVALID if the clear operation | |
| 71 | * was not waited-on using the handle or if the arguments of the function are | |
| 72 | * invalid (e.g. NULL). | |
| 73 | */ | |
| 74 | extern enum lttng_clear_handle_status | |
| 75 | lttng_clear_handle_get_result( | |
| 76 | const struct lttng_clear_handle *handle, | |
| 77 | enum lttng_error_code *result); | |
| 78 | ||
| 79 | #endif /* LTTNG_CLEAR_HANDLE_H */ |